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GMC K3500 Holley Parts and Accessories

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On Sale

Holley Sniper 2 EFI 650 HP Base Fuel Injection Systems

Holley Sniper 2 EFI Base Fuel Injection Systems are self-tuning, easy-to-install, EFI conversions for 4-barrel (4150 flange) style carburetors. They took everything that they learned from the original Sniper EFI system and added new features that will make your EFI conversion more simple, reliable, and modern. Like all Sniper EFI systems, Sniper 2 is designed to work with the Sniper Ecosystem that includes Hyperspark ignition, complete fuel systems, multiple user interfaces/dash displays, and more. Make your classic drive like a modern fuel-injected vehicle, with easy cold starts, smooth drivability, and improved fuel economy! Sniper 2 is designed to be installed at home in your garage with limited tools and the support of Holley's comprehensive installation manual and videos. The user-friendly setup wizard allows you to answer a few simple questions about your engine—and the system will begin self-tuning with no laptop or tuning required. If you're looking for a high-performance fuel injection system that delivers power, efficiency, and ease of use, look no further than the Sniper 2 EFI. Main features: * Only 4 wiring connections required: Battery+, Battery-, Switched Ignition, and RPM * Innovative clamping system allows you to locate the module anywhere in the tank beside your existing sending unit and can be rotated 360 degrees for easier clocking. * Main harness includes plug-and-play HyperSpark distributor support for integrated timing control, making your ignition setup hassle-free * Wide variety of tuning and gauge display options: from a 3.5 in. full-color LCD hand-held, 5 in. digital dash, or the Bluetooth dongle, which allows you to connect either an iOS or Android based cell phone to your Sniper 2 * Female -6 AN O-ring fittings * Overall height is only 3.280 in. * Supports up to 650 hp naturally aspirated or 575 hp on boost with four 100 lbs.-hr. injectors * For applications using a vehicle specific EFI conversion tank and fuel pump, or already having a fuel system capable of the required 55-65 psi, these systems are offered without a pump and fuel lines * Next generation ECU features improved RF noise and interference resistance (stands up to old car wiring, noisy alternators, faulty plug wires) * Redesigned throttle shaft and plate geometry for a smoother throttle feel * Integrated transmission kickdown provisions for GM TH350/400, 200-4R/700R4 and Ford C4/C6 applications * "Hidden Harness" wiring exit from the rear of throttle body for a clean appearance * Inputs and outputs consist of: 2x ground inputs, 2x ground outputs, 1x TPS output (0-5 V), and 1x tach output * Redesigned injector connector for improved reliability * Onboard contactless magnetic TPS sensor ensures an accurate TPS reading * Next generation mil-spec style M8 positive lock connector for CAN1 and CAN2 provides the latest in CAN bus technology for a simple yet robust connection * Cast-in fuel crossover from the primary to secondary fuel rail * The included Bosch LSU 4.9 wideband oxygen sensor provides real-time fuel map learning * Included clamp-on oxygen sensor kit ensures a leak-free oxygen sensor install with stainless steel T-bolt clamps and a stainless steel weldable oxygen sensor flange * Sniper 2 throttle bodies are serialized, which provides an improved experience in the event of any unit needing to be inspected

4.19 out of 5 stars ( 31 )

$1,399.95


$1,258.95

On Sale

Holley Mid-Mount Complete Accessory Systems

Holley Mid-Mount complete accessory systems achieve what no other accessory bracket systems do--eliminate the brackets! This pulls in all the accessories tighter than other accessory drives by bolting directly to other components for a clean, integrated form. They offer superb engine visibility to show off your horsepower, not your accessories. Holley Mid-Mount complete accessory systems are available in several versions and finishes to match your application. Order the kit designed to fit your engine.

4.62 out of 5 stars ( 107 )

$2,049.95

$2,202.95


$1,843.95

$1,981.95

On Sale

Holley Sniper EFI HyperSpark Distributor Kits

Holley Sniper EFI HyperSpark distributor kits were designed to make upgrading your ignition on a Sniper EFI-equipped engine simple. When installed concurrently with a new Sniper EFI system, the combination creates the easiest way to install EFI conversion on the market—and only four flying lead connections are required! The harness only requires one connection to a switched power source, battery positive, battery negative, and fuel pump power. The pre-terminated connectors and a built in 40A relay provides power to all of the components within the system. With the included Sniper EFI main harness you no longer need to run multiple wires to provide switched power for each individual component, which not only helps prevent wiring confusion, but it will also speed up your install time and clean up your engine bay. Simply route the harness and pre-terminated connectors to your HyperSpark coil, distributor, and ignition box and plug them in. Available for all popular engine combinations, these kits come with a distributor, coil, ignition box, and an integrated Sniper EFI harness. Order the application you need. Key features: * Plug-and-Play Sniper EFI main harness replaces the standard Sniper EFI harness with four loose leads, battery positive, battery ground, switched 12 V, and fuel pump power, for a simple and streamline installation * Designed for existing or new Sniper EFI installations (the HyperSpark Master Kit harness retains the same flying lead wire colors as the Sniper EFI main harness; new installations will not use the Sniper EFI standard harness or coil driver * Complete ignition system in a box, including: HyperSpark ignition box, HyperSpark ignition coil, HyperSpark distributor (for your application), and a plug-and-play main harness * HyperSpark distributors feature a Hall Effect crank trigger sensor providing a noise-free rpm signal to the Sniper ECU * Patented clear installation cap eliminates any confusion while installing the distributor * HyperSpark CD ignition box is seal and powder coated to be installed in the harshest of locations * External LED on HyperSpark CD Ignition box helps verify 12 V, cranking rpm, and low battery voltage * 135mJ of spark energy when used with the HyperSpark ignition coil, ensures complete combustion * Integrated ignition coil bracket simplifies mounting the Ignition coil * Ignition coil connector removes any doubt of loose connections at the Ignition coil * Enables timing control on a Sniper EFI Installation

4.22 out of 5 stars ( 23 )

$1,024.95


$921.95

On Sale

Holley Sniper EFI HyperSpark Distributors

Do you need to upgrade your ignition system due to a recent Sniper EFI installation, but have no idea which option is best? Introducing Holley Sniper EFI HyperSpark distributors. These billet distributors use a hall-effect crank signal sensor, providing a noise-free RPM signal to the Sniper ECU. HyperSpark distributors include a patented clear installation cap that eliminates any confusion when installing the distributor. They're an easy plug-and play solution to add timing control and complete your Sniper EFI installation. Many options are available; choose the model recommended for your year/make and engine application.

4.24 out of 5 stars ( 127 )

$460.95


$413.95

On Sale

Holley Mechanical Fuel Pumps

Holley Street Performance mechanical fuel pumps are designed to work with stock or mildly modified engines. Ranging in performance styles of 80 to 225 gph, their body castings can be rotated 360 degrees to ease mounting in difficult places and they have large orifices for high flow rates. These pumps are not compatible with methanol or alcohol fuels and should not be used with fuel injection systems. A fuel pressure regulator is required for 130 gph versions.

3.87 out of 5 stars ( 360 )

$145.95

$161.95


$124.96

$131.35

On Sale

Holley EFI Dual-Sync Distributors

Precise timing control—Holley EFI dual-sync distributors are built with two Hall effect sensors for crankshaft and camshaft signals. The distributors can be used as just a crankshaft speed input or provide a camshaft sync signal for sequential fueling operation. They're also useful for crank and cam signals when running coil-on-plug applications. Dozens of models are available; order the one recommended for your vehicle/engine application. Some features of Holley EFI dual-sync distributors include: * CNC-machined billet aluminum housings with integrated LEDs for easy setup * Hardened steel distributor gear * Precision-machined shutter wheels that ensure accurate timing—even at very high RPM * Designed to be plug-and-play with Holley systems, but may be used with other EFI systems that support Hall effect crankshaft and camshaft sensors * Housings are available in a variety of finishes

3.35 out of 5 stars ( 37 )

$511.95

$549.95


$459.95

$493.95

On Sale

Holley Track Series Valve Covers

Holley Track Series valve covers are GM licensed and provide an excellent way to add high-end appeal to your favorite Chevy engine. These lightweight, yet tough valve covers are constructed of 6061 T-5 sheet aluminum, precision TIG-welded for a proper fit. They feature laser-etched Chevrolet and Bowtie emblems. The covers are available in silver anodized or black coated finishes, along with various heights to clear most popular rocker arm combinations. All models include mounting hardware for quick and simple installation.

4.03 out of 5 stars ( 74 )

$235.95


$184.45

$224.95

On Sale

Holley Sniper In-Tank Retrofit Fuel Pump Modules

Holley Sniper in-tank retrofit fuel pump modules offer the easiest way to convert your vehicle to an in-tank EFI fuel system. Available in return and returnless versions, these 340 lph pumps are easy to install with basic hand tools and require no welding or fabrication. They include a diecast pump hanger bracket to control pump vibration in a low-profile design that's perfect wherever space is at a premium. You can locate the module beside your existing sending unit anywhere in the tank and rotate it a full 360 degrees to work flawlessly with various plumbing and wiring configurations. Once the module is installed, all you need to do is connect your power source/ground and fuel lines. Up your fuel game with an assist from the Holley Sniper in-tank retrofit fuel pump modules best suited for your application. Features and specs include: * Models available for various fuel tank depths, including adjustable (7-12 in.) versions * The low-profile design is only 1.275 in. thick above the tank mounting surface for added clearance when needed * The innovative clamping system allows you to locate the module anywhere in the tank beside your existing sending unit and rotate the unit 360 degrees for easier clocking of the plumbing and wiring locations * Diecast aluminum construction for corrosion resistance and long-lasting good looks

4.48 out of 5 stars ( 29 )

$409.95


$367.95

On Sale

Holley Sniper EFI Quadrajet Self-Tuning Fuel Injection Systems

Holley Sniper EFI Quadrajet self-tuning fuel injection systems are ideal replacements when you're tired of rebuilding the 50-plus-year-old Rochester Quadrajet (Q-jet) on your classic ride. They're the first bolt-on, spread-bore, EFI throttle-body systems not requiring any additional adapters, sealing plates, or intake manifold swaps. They retain the same great features as the 4150 Sniper EFI version (four 100 lbs.-hr. injectors; built-in timing control; high resolution 3.5 in. full color touchscreen; etc.). Their throttle body will support naturally aspirated power up to 500 hp. In addition, they offer multiple fuel inlet configurations that allow for a stock-appearing installation and fit most stock air cleaners. Modernize your Q-jet-powered classic vehicle with a Holley Sniper EFI Quadrajet self-tuning fuel injection system. They are offered individually or in Master kits with external fuel pressure regulator preset to 58.5 psi, 20 ft. of 3/8 in. Vapor Guard fuel hose, fuel pump, filters, necessary hardware, and bulkhead fitting to return fuel into the tank. Features, items, and specs: * Designed to deliver the signature "Rochester Roar" at wide-open throttle! * Throttle body-mounted ECU–no extra boxes to mount * Only 4 wiring connections required (battery positive and negative, switched ignition, and rpm) * Transmission provisions on throttle lever for TH350/TH400 and 200R4/700R4 * Universal throttle and transmission kick-down bracket * Brake booster adapter (if required) * Simple calibration wizard (answer a few questions about your engine and it creates the base map, then starts tuning on its own—no laptop required) * Internal fuel pressure regulator preset to 58.5 psi * 20 ft. of 3/8 in. Vapor Guard fuel hose * Fuel pump and filters * Necessary hardware and bulkhead fitting to return fuel to the tank * Genuine Bosch LSU 4.9 wide-band oxygen sensor provides real-time fuel map learning * OEM-style throttle position sensor (TPS) and idle air control (IAC) for years of dependable service * Clamp-on oxygen sensor kit ensures leak-free oxygen sensor installation with stainless steel T-bolt clamps and weld-ready oxygen sensor flange * United States Coast Guard approved (certified to ISO 8846, SAE J1171 requirements) * Available in three finishes--Classic Gold, Shiny, and Black Ceramic

3.0 out of 5 stars ( 7 )

$1,699.95


$1,528.95

On Sale

Holley GM Gen V LT Retrofit Oil Pans

Holley GM LT retrofit oil pans provide maximum clearance to the chassis and ground; plus, they provide OEM fitment for durability and proper sealing. GM's Gen V LT direct-injected engines are finding their way into a large variety of vehicles. They make great power, they're durable, and reliable, but unfortunately, the factory oil pans don't always fit--or they hang too low for today's hot rods. Holley LT retrofit oil pans are designed to help! Features include: * Cast and machined aluminum * Allow for up to 4.00 in. crankshaft stroke * Can be used anywhere a GM F-body oil pan can be used * Provide OEM fitment--oil filter mounting, OEM engine NVH suppression, OEM flange sealing, proper structural rigidity, and OEM bellhousing attachments * Traditional high-quality cast aluminum appearance with clean exterior styling * Provide maximum clearance for vehicles where the steering linkage is behind the engine crossmember * Oil cooler port provision * 1/2 in. NPT port--ideal for turbo oil return or PCV oil return * Drag race version includes special hinged door baffles and pickup

4.64 out of 5 stars ( 33 )

$475.95

$614.95


$427.95

$552.95

On Sale

Holley Sniper In-Tank Fuel Pump Modules

Holley Sniper in-tank fuel pump modules are direct-fit units to drop directly into the specific vehicle application. Two modules--the Sniper 340 lph and Holley 525 lph--feature a 6061 T-6 flange that has a bright dip black anodized finish for corrosion protection and long-lasting good looks. The flanges have a 6AN O-ring outlet and return port making the plumbing connections easy. The assembled modules include a new filter sock and the lock ring to complete the installation into your stock fuel tank. Choose the module designed for your vehicle. Notes: * Includes a pre-calibrated fuel-level sending unit designed to work with the factory fuel gauge for the specific application * 340 lph module supports up to 700 EFI or 900 hp carbureted * 525 lph module supports up to 1,200 EFI or 1,450 hp carbureted * Both EFI and carbureted systems will need a bypass design regulator

Not Yet Reviewed

$532.95


$478.95

On Sale

Holley Sniper Fabricated Aluminum Valve Covers

Holley Sniper fabricated aluminum valve covers deliver high-end looks without the high-end price! They're constructed from 6061 T-5 sheet aluminum and precision TIG-welded for a proper fit. Plus, they feature thick one-piece CNC billet flanges for superior sealing. Sniper valve covers are available in your choice of natural or black powdercoat finishes, as well as with or without breather openings—and heights to clear most popular rocker arm combinations. Holley includes mounting hardware for quick and simple installation. Order a pair for fitment on your particular engine application.

4.02 out of 5 stars ( 87 )

$255.95


$195.25

$245.95

On Sale

Holley Sniper EFI Conversion Fuel Tanks

One of the most popular updates for an older vehicle is swapping out the carburetor for electronic fuel injection (EFI); but using an external pump to supply the high pressure needed for EFI can be a problem. External pumps are loud and often difficult to mount properly. Holley Sniper EFI conversion fuel tanks are the complete bolt-in solution for your EFI conversion. They're a direct-fit for a wide variety of specific applications, require no modifications, and include either a 255 lph or 400 lph submersible pump, a fuel level sender, and internal baffles. For the fuel you need with in-tank quietness, order a Holley Sniper EFI conversion fuel tank. Features include: * 255 lph model supports up to 550 hp * 400 lph model supports up to 750 hp * 60 psi at 13.5 V with a 10.4 amp draw * Made of coated, galvanized steel that is also silver powdercoated for corrosion protection * Fuel pump hanger assembly included * Sender has 1/4 in. NPT supply and return line ports for easy fuel line connection * Barbed vent fitting * Sending units have the correct ohm range for factory gauges * Fuel pump and sender are recessed into the tank * EFI-style tank baffling includes a 4.3L internal fuel tray to prevent starvation * Fits and looks like an OE tank when installed * Include new tank straps, where applicable

4.13 out of 5 stars ( 110 )

$819.95

$870.95


$736.95

$782.95

On Sale

Holley M/T Valve Covers

Holley M/T valve covers are flashbacks to 1972. Nothing was cooler than cruising in your hot rod with a Holley double pumper and M/T finned aluminum valve covers. Each Holley M/T valve cover is precision-manufactured with knockout plugs for stock PCV and oil fill installations. These covers feature polished top cover surfaces that may be used for engraving your name horizontally next to the deep heat dissipating fins. Available in your choice of black crinkle or a polished finish, each Holley M/T valve cover comes in retro packaging styled after the original. Order the pair designed for your engine application.

4.45 out of 5 stars ( 31 )

$614.95


$269.95

$552.95

On Sale

Holley GM Gen-V LT Engine Swap Oil Pans

Holley GM Gen-V LT engine swap oil pans are designed for LT engine swap installations in classic car and truck chassis' requiring more oil pan to chassis clearance around the front half of the oil pan. GM's new Gen V LT direct injected engines are starting to find their way into a large variety of vehicles. They make great power and are very durable and reliable. Unfortunately, the factory oil pans don't always fit or they hang too low for today's hot rods. The solution? Holley's GM Gen-V LT swap engine oil pans! They will provide maximum clearance to the chassis and ground, plus, they provide an OE-style fitment for durability and proper sealing. Features: * These oil pans are perfect for: 1967-1992 Camaro/Firebird, 1968-1974 Nova/Apollo/Ventura/Omega, 1978-1987 G-body, 1964-1972 A-body, and 1973-1987 Chevy/GMC Full Size Trucks * Designed to provide more oil pan to chassis clearance around front half of the oil pan * Allows for up to 4.00 in. crankshaft stroke * Can be used anywhere a GM F-Body oil pan can be used * Provides OE-style fitment—OE oil filter mounting, OE oil cooler port provision, OE engine NVH suppression, OE flange gasket and sealing, proper structural rigidity, and OE bell-housing attachments * Traditional high-quality cast aluminum appearance with clean exterior styling * Provides maximum clearance for vehicles where the steering linkage is behind the engine cross-member * Oil cooler port provision * Cast and machined aluminum * 1/2 in. NPT port—ideal for Turbo oil return or PCV oil return * Optional hinge door baffle (available separately) * Complete kit includes: windage tray, sump baffle, OE-style pick-up tube, sump port plug, oil filter stud, billet oil passage cover, etc.

3.0 out of 5 stars ( 2 )

$562.95


$505.95

On Sale

Holley Retrofit Engine Oil Pans for GM LS Engines

Holley retrofit engine oil pans for GM LS engines are designed to install an LS engine in a variety of GM muscle car and truck chassis. They provide OEM fitment, OEM oil filter mounting, OEM oil cooler port provision, OEM engine NVH suppression, OEM flange gasket and sealing, proper structural rigidity, and OEM bellhousing attachments. The oil pans are manufactured from traditional high-quality cast aluminum and include a sump baffle, oil pump pickup tube, sump plug, oil filter stud, and oil passage cover.

4.61 out of 5 stars ( 249 )

$434.95

$481.95

On Sale

Holley Sniper Stock Replacement Fuel Tanks

Holley Sniper stock replacement fuel tanks are designed to meet or exceed the quality of your factory original. Whether you have a track or street car, or a car you're restoring, Sniper has the high-quality fuel tanks you're looking for. Start your fuel system project fresh with a Holley Sniper stock replacement fuel tank—order the model designed for your application. Features include: The steel fuel tanks have a powder coated finish for corrosion protection and good looks. Stock replacement fuel tanks are made to oem specifications for a great fit for your ride. They are a perfect companion when using our Holley Musclecar EFI modules or our Retrofit EFI Pump modules. Tank sending unit lock ring is included Tank straps are not included

4.21 out of 5 stars ( 66 )

$231.95


$171.85

$208.75

On Sale

Holley Sniper EFI Installation Kits

Holley Sniper EFI installation kits contain all of the small mechanical and electrical tidbits you might need while installing a Sniper EFI throttle body system. Are you building a new engine combination with Sniper EFI? Or maybe you misplaced some of the carburetor studs or the throttle linkage stud when you removed your carburetor? Holley Sniper EFI kits will save you a hassle. Features include: * Four carburetor studs and nuts * Throttle linkage stud assortment * Universal air cleaner stud * Zip-ties to keep wires and cables away from harm * Assorted wiring connectors for OEM-quality connections * 4150 flange base gasket, 2300 flange base gasket, and an air cleaner gasket

4.25 out of 5 stars ( 4 )

$48.74


$43.87

On Sale

Holley Drop-In Fuel Module Assemblies

Holley drop-in fuel module assemblies cover a wide range of vehicles and performance expectations—including dual pump designs. These replacement assemblies meet the highest-quality standards offered for increased performance and fuel efficiency. Holley drop-in fuel modules are capable of supporting 550-plus horsepower right out of the box! Dozens of models are available, with flow rate options between 50 and 277 gph. Order the fuel module recommended for your vehicle. Features may include: * Plug-and-play wiring harnesses * Integrated fuel storage and filtration technology * Built-in, pre-calibrated fuel level sensors * HydraMat filter (keeps fuel available at the pick-up during radical maneuvers and provides contamination protection) * Most models include sending unit

3.5 out of 5 stars ( 8 )

$390.95

On Sale

Holley LS Swap 4WD Truck Off-Road Oil Pan Baffles

Holley offers LS swap 4WD truck off-road oil pan baffles for a variety of trucks, including many Chevy and GMC models from the 1970s and '80s. They take Holley's popular cast aluminum oil pans (P/N 302-4 and 302-4BK) designed to swap LS engines into K10s and other trucks to a whole new level. Vehicles that endure prolonged sessions of climbing, crawling, braking, turning, and accelerating need extra protection from oil starvation. That's where these baffle kits come in. They improve upon the baffle included with those pans, maintain proper oil level at the oil pump pick-up during vehicle elevation and grade changes, accelerations, both lateral and linear, and braking. This prevents loss of engine oil pressure during off-road excursions as well as during hard acceleration. Each baffle is fabricated from sheet aluminum joined by TIG-welded joints. Directionally positioned one-way trap doors allow oil flow toward the oil pump pick-up but not away. These direct bolt-in baffles are designed to be used in the Holley P/N 302-4 and 302-4BK LS Swap oil pan with the standard pickup, and are a drop-in replacement for the standard tray baffle. They're great for street, race, and off-road applications.

Not Yet Reviewed

$217.95


$145.21

Holley EFI 7 in. Dash Bezels

Holley EFI 7 in. dash bezels work with your Holley EFI dash for muscle car and truck applications. The bezels feature a quality UV-resistant ABS composite material for strength beyond the OEM panels, and the durable finish will accent your interior. Enhance your vehicle's dashboard with the Holley EFI 7 in. dash bezels designed to fit your application.

Not Yet Reviewed

$562.95

On Sale

Holley Sniper EFI Fuel Tank Systems

Holley Sniper EFI fuel tank systems will complete your EFI swap. They fit and look like an OE tank, but each Sniper tank is a direct-fit for your application, which means no modifications for you to perform. The tanks are powdercoated galvanized steel for corrosion resistance and lasting good looks. Your Holley Sniper EFI fuel tank kit will include the tank, fuel pump, fuel level sender, and internal baffling. Some kits may also include filler neck and tank straps. Sniper EFI tanks feature: * Fuel pump (255 lph) with hanger assembly gives you the fuel you need with in-tank quietness * Sender has 1/4 in. NPT supply and return line ports for easy connection and a barbed vent fitting * Fuel level sender has the correct ohm range for your factory gauges * Fuel pump and sender are recessed in the tank to provide an easy installation * EFI-style tank baffling includes a large 4.3L internal fuel tray to prevent fuel pump starvation

4.33 out of 5 stars ( 24 )

$1,024.95


$921.95

$1,024.95

On Sale

Holley Vintage Series Valve Covers

Put your Holley pride on display with a set of attractive Vintage Series valve covers. Their die-cast aluminum construction ensures high detail, while reducing the opportunity for oil leaks and warping of the flange. Choose from among a half-dozen finishes to give your engine a clean, professional look. The vehicle-specific covers are available for every model year dating as far back as 1958.

3.97 out of 5 stars ( 34 )

$460.95

On Sale

Holley EFI 6.86 in. Dash Bezels

Holley EFI 6.86 in. dash bezels are available for muscle car and truck applications. Designed to work with Holley dashes, the bezels are made from a 5/32 in. thick UV-resistant ABS composite material and structurally as strong or stronger than the OEM panels. Holley EFI dash bezels come in a matte black finish that will accent your interior.

1.0 out of 5 stars ( 4 )

$665.95