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CHEVROLET Chevy small block Gen III/IV (LS-based engines) Air & Fuel Delivery

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Results 1 - 24 of 100

Summit Racing™ Billet Throttle Bodies

Summit Racing™ billet throttle bodies are designed with larger openings (92mm or 102mm) to improve throttle response and provide maximum airflow. They're precision CNC-machined from billet aluminum and available in your choice of natural or black anodized finishes. Feed your LS engine the air it needs—and unleash its hidden horsepower! Order the Summit Racing™ replacement throttle body recommended for your vehicle.

4.88 out of 5 stars ( 24 )

$169.99

$180.99

On Sale

Holley Sniper Throttle Bodies

With Holley Sniper throttle bodies, Holley engineers went back to the drawing board to build the ultimate air valve for your engine! They feature enlarged bore sizes, allowing for increased airflow to support your higher horsepower needs. A progressive throttle pulley enhances low-speed drivability, and a double return spring provides solid and secure throttle control feel. These units are maximized for your application, with a 4-bolt style mounting pattern; most models include bolts and gaskets. Order the throttle body designed for fitment with your year/make and engine family.

3.92 out of 5 stars ( 39 )

$349.95


$192.95

$267.95

Walbro Electric In-Tank Fuel Pumps

Walbro electric in-tank fuel pumps are available in a variety of flow ratings, including pumps that flow significantly more fuel at higher pressure. The outside dimensions, however, of many pumps are compact enough to fit existing hanger assemblies, without modification. All pumping components have been validated to OEM specifications for use in E85/flex fuel applications. Most Walbro in-tank fuel pumps utilize a proven gerotor design. Some high-performance models, including those designed for engines with more than 750 hp, feature a dual-channel turbine design for maximum efficiency in high-pressure and high-temperature applications. The blades feed two high-pressure pumping channels, as opposed to a conventional single-stage pump that uses an impeller with a single row of blades at its outer edge. This innovative design results in improved hot fuel flow, as well as minimal noise and current use, resulting in efficiency that's higher than conventional pumps. Some pumps require modifications to system wiring, fuel lines, and the fuel module, and should be professionally installed. Installation kits including a fuel strainer, fuel hose, harness pigtail, clamps, and wire connectors are sold separately.

4.45 out of 5 stars ( 370 )

$271.99

FiTech Throttle Bodies

FiTech throttle bodies provide high-flow for your LS engine. They are built with cast aluminum construction and include the IAC motor. They are offered in two low-profiles with diameters of 92mm and 102mm available.

4.26 out of 5 stars ( 50 )

$192.00

Holley EFI Fuel Rails

These machined aluminum EFI fuel rails are capable of handling 1,100+ hp engines. They feature a large inner diameter bore to decrease fuel pressure drop and help cancel out back pulses.

4.41 out of 5 stars ( 54 )

$228.95

$249.95

Summit Racing™ Ignition Coil Wiring Harnesses

Summit Racing™ ignition coil wiring harnesses can facilitate a hassle-free connection of the coil to the wiring harness. That means no more cutting or splicing wires! These adapter harnesses are made from quality material for lasting durability—and they include all the necessary connectors to provide a fast, effortless installation. Order the model recommended for your application.

4.08 out of 5 stars ( 12 )

$137.99

Summit Racing™ Fuel Rail Kits

Our lightweight Summit Racing™ fuel rail kits fit like stock, but deliver the increased fuel volume that your LS1 needs for maximum performance. The 3/4 in. i.d. rails are precision CNC-machined from high-strength aluminum with a great looking, black anodized finish. The kits include fittings with Viton® O-rings for a superior seal, mounting brackets, and stainless steel hardware.

3.86 out of 5 stars ( 37 )

$104.99

$114.99

ACDelco GM Genuine Parts Fuel Injection Throttle Bodies

ACDelco GM Genuine Parts fuel injection throttle bodies are GM-recommended replacements for your vehicle's original component. It is located on the intake manifold, and contains the throttle plate(s) that control the air entering the engine. The throttle body also houses the fuel injector(s) on Throttle Body Injection (TBI) or Central Fuel Injection (CFI) systems. These true OE fuel injection throttle bodies have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

4.84 out of 5 stars ( 37 )

$165.99

$262.99

Lokar Midnight Series Throttle Cables

Lokar Midnight Series throttle cables have a PTFE inner liner and a black braided stainless steel jacket, along with aluminum clevis ends for smooth, no-bind cable operation. They can be easily adapted to fit most gas pedals and throttle assemblies. The cables are available in different lengths and cable end types; order the universal-fit or application-specific model recommended for your vehicle and engine family.

4.76 out of 5 stars ( 107 )

$106.95

Spectre Performance Cold Air Intake Kits

Spectre Performance cold air intake kits provide better acceleration and fuel economy for your truck or SUV. They're designed to replace your factory air filter and air box assembly, eliminating the restriction as they smooth and straighten airflow. The high-flow design of these intakes enables your engine to breathe in a larger volume of air, resulting in more usable power throughout the engine's entire rpm range. Hundreds of models are available, with various tube and filter options. Choose the kit tailored for fitment and performance on your make/model application.

4.35 out of 5 stars ( 831 )

$174.99

$199.99

Holley LS Steam Vent Kits

Holley LS steam vent kits prevent hot spots or overheating. Designed to eliminate trapped air and steam from your engine, these complete kits are available to plumb your engine and include the appropriate hose and hose ends to make installation a breeze. They are more attractive than the OEM lines and offer increased flexibility when using aftermarket intakes and other accessories on your performance vehicle. Holley LS steam vent kits may feature: * Adjustable pivoting steam vent adapters * Black push-on or stainless braided Speed-Flex hose and hose ends * Available in front or 4-corner plumbing options

4.91 out of 5 stars ( 11 )

$170.95

Summit Bucks

Delphi Idle Air Control Valves

Add Delphi fuel injection idle air control valves to control the airflow into your engine. Delphi OE replacement valves provide a superior fit and finish that result in an easier installation for you. Their idle air control valves meet federal emissions regulations, increase your fuel efficiency, and eliminate the potential for malfunctions. Get control over the amount of air allowed to flow into your engine, and your engine idle speed, in a variety of load conditions when you replace your air control valves with Delphi fuel injection idle air control valves.

4.65 out of 5 stars ( 34 )

$109.99

Trick Flow® Engine Steam Line Plumbing Kits for GM LS

Your modified LS-powered cars and trucks will be easier to service with an upgrade to a race car plumbing system. These plumbing kits contain black anodized billet aluminum fittings, O-rings, stainless steel bolts, and all of the necessary hose to plumb just the front of the heads or all four corners. Choose the most desirable upgrade to your factory steam tubes--Trick Flow® engine steam line plumbing kits for GM LS.

4.08 out of 5 stars ( 75 )

$138.95

$148.95

FAST LSX High-Flow Billet Fuel Rails

FAST LSX high-flow billet fuel rails feature a larger internal diameter that is designed to dampen the pulses and provide increased fuel volume, ensuring that your fuel injectors never run dry. They are manufactured from high-strength billet aluminum and are red anodized for maximum durability. These fuel rails include aluminum black anodized -8 AN fittings and "super-seal" O-rings that are component-matched to maximize fuel distribution. Upgrade your fuel system while adding some horsepower with these FAST LSX high-flow billet fuel rails.

3.21 out of 5 stars ( 29 )

$248.95

$297.95

Holley Sniper EFI Fuel Rails

Holley Sniper EFI fuel rails hit the mark every time--on time! It's not enough to shoot fuel to your injectors; the process must be consistent and precise for efficient engine performance. Holley Sniper kits will deliver the performance, and they feature billet aluminum rails with a black anodized finish and a laser-engraved Sniper logo. If your target is the optimum delivery of fuel, equip your manifold with Holley Sniper EFI fuel rail kits.

3.88 out of 5 stars ( 40 )

$189.95

$212.95

ICT Billet Intake Manifold Adapters

ICT Billet intake manifold adapters mate cylinder heads to intake manifolds or supercharges. They are offered to adapt a variety of cylinder heads and intakes. The plates are made from aerospace-grade 6061 T-6 billet aluminum. The kits come with adapter plates and O-ring seals. Depending on the specific application, different length intake manifold bolts may be required (not included).

4.13 out of 5 stars ( 8 )

$239.99

Airaid Modular Intake Tubes

Airaid modular intake tubes optimize airflow to the engine by replacing inefficient originals. Factory tubes often have accordion-shaped walls, sound-canceling baffles, and undersized tube diameters that hurt airflow. The Airaid modular intake tubes help straighten and improve airflow to the engine, while also offering the best location for your mass air sensor. This design provides better throttle response, additional horsepower, and better fuel economy. These tubes are constructed from cross-linked, high-density polyethylene for strength and resistance to heat transfer. Airaid modular intake tubes are direct replacements for factory models, accommodating all sensors and fittings that attach to the factory tube. These tubes also work with the factory throttle body and intake box, and they include all necessary couplers and clamps for installation.

4.59 out of 5 stars ( 166 )

$153.99

$176.99

Lokar Hi-Tech Throttle Cables

Lokar Hi-Tech throttle cables are available in stainless steel braided, black stainless steel braided, or black polyethylene housings. They're designed with a specially extruded liner for the extended life of the cable—not to be confused with ordinary braided brake hose. These cables are equipped with aluminum fittings and aluminum ferrules to eliminate fraying; and feature a "U-Cut-to-Fit" outer housing and stainless inner wire. The clevises are designed without cotter pins or set screws and adapt to factory and aftermarket pedals for an easy installation. Each cable comes with installation instructions. Order the universal-fit or application-specific model recommended for your vehicle and engine family.

4.81 out of 5 stars ( 657 )

$106.95

$126.95

On Sale

Summit Racing™ Fabricated Intake Manifolds

A properly fabricated intake manifold can produce significant gains in your engine's performance. Add one of our Summit Racing™ fabricated intake manifolds to your engine combination to make more power! Each of these stock/OEM deck engine block style intake manifolds is manufactured to exacting standards utilizing the latest CNC machining and fabricating equipment. Simply find and order a perfect fit for your specific make and model vehicle.

3.19 out of 5 stars ( 31 )

$349.99


$249.99

Dorman Throttle Bodies

Restore proper engine function with Dorman throttle bodies. These electronic assemblies will maintain the correct volume of airflow into your engine. Each of these units features a butterfly valve, which is electronically controlled by the ECU to precisely open and close for the correct regulation of the fuel/air mixture. Many feature cast aluminum housings with an exact fit for an easy installation. Dorman throttle bodies offer durable, reliable performance that is essential to the operation of your engine.

4.25 out of 5 stars ( 16 )

$171.99

$196.99

ACDelco GM Genuine Parts Throttle Bodies

ACDelco GM Genuine Parts throttle bodies are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. The throttle bodies are located on the intake manifold and contain the throttle plate(s) that control the air entering the engine. The throttle body also houses the fuel injector(s) on Throttle Body Injection (TBI) or Central Fuel Injection (CFI) Systems. Some of the key benefits that these throttle body components provide are better throttle response, increased airflow, and improved high rpm performance.

5.0 out of 5 stars ( 1 )

$148.99

Summit Bucks

Delphi Fuel Injectors

Delphi fuel injectors are engineered with an accurate, controlled spray pattern that reduces emissions and improves cold-start capabilities. These replacement injectors have a recessed fuel exit and no internal seal rings—in order to minimize leakage and possible puddling. Delphi fuel injectors are durable, dependable, and offered for a wide variety of applications. Order the OEM stock replacements designed for your vehicle.

4.56 out of 5 stars ( 9 )

$100.99

Tanks Inc. Single Fuel Tank Line Kit for GM LS

The single fuel tank line kits for GM LS from Tanks Inc. includes 25 ft. of line and all the fittings that you need for your LS engine swap using one fuel pump and one tank. The kits are designed for LS engines that have a single fuel inlet fitting. Kit includes: * Fuel filter/fuel regulators * In-Line check valve * (2) 1/4 in. NPT to -6AN adapter fitting (fuel pump pickup and return line fittings) * (6) Russel straight -6AN straight Twist-Lok fittings * Russell 3/8 in. Male Quick Disconnect to -6AN Male fittings—fuel feed from regulator to engine fitting * Russell 3/8 in. Female Quick Disconnect to -6AN Male fittings—fuel regulator feed from pump and fuel rail fitting * 25 ft. of -6AN black push lock fuel hose

Not Yet Reviewed

$199.99

Edelbrock GM Stepper IAC Motors with Gasket

Automobile engines are a perfect balance of science and mechanical engineering. Each part is designed to interact with the other in perfect harmony to produce a means of transportation. One very small, but very vital component found in this mass orchestra of mechanics is the idle air control valve, or better known to mechanics as the IAC. Edelbrock offers their version, the GM stepper IAC motors, that also includes a valve gasket. The IAC valves adjust the airflow to improve motor idling. The gasket provides a tight seal to avoid a leaky throttle system, which could be a nuisance and also dangerous.

5.0 out of 5 stars ( 1 )

$124.95

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