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1985 GMC Ignition Components
Showing In Stock Items. Show All 131 Items.
On Sale
MSD Pro-Billet Distributors
MSD Pro-Billet distributors share the same CNC machining techniques as the rest of the MSD distributor line. They feature a housing that's machined from high-quality 6061-T6 aluminum for durability and show-quality looks. Their oversized shaft receives a QPQ coating for friction reduction and corrosion resistance, with the added strength of two sealed ball bearings that guide the shaft accurately at well over 10,000 rpm. An extra-long sintered bushing replaces the ball bearing at the bottom of Chevrolet models. TIG-welded on top of the polished steel shaft is MSD's accurate mechanical advance assembly. The weights are supported by nylon pads that allow the advance to operate smoothly throughout the rpm range. For all-out racing, the advance mechanism can also be easily locked out. To accurately trigger the ignition, a high-output magnetic pickup is bolted to the base. This pickup produces a precise trigger signal that will never vary more than one degree at any rpm. A durable gear is installed for performance applications, and an MSD red cap with brass terminals and race rotor is supplied. They're available in standard and small diameter models for applications with limited clearance, and require the use of a separate ignition box such as an MSD 6, 7, 8, or 10 Series ignition.
( 409 )
$399.95
On Sale
MSD Blaster 2 Ignition Coils
MSD Blaster coils put out 45,000 V, which are 15,000 more than stock. They also have an oil-filled metal canister and will fit stock mounting brackets.
( 449 )
$55.85
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.
( 127 )
$460.95
On Sale
ACCEL Performance Replacement Distributors
ACCEL Performance replacement distributors are perfect for your daily driver or street machine. They're built with all-new components and high performance ACCEL electronics. Each model's design features the materials and accessories that make for an easy installation while providing the fit, form, and function you need. Order the ACCEL Performance replacement distributor designed for your engine when you need a quality substitute or want better performance.
( 157 )
$128.95
MSD Pro-Billet HEI Distributors
The MSD Pro-Billet HEI distributors pick up where the originals left off. Drawing on years of high-performance ignition experience, MSD engineers created a unique ignition module and internal coil that are capable of running above 9,000 rpm. Stock and other aftermarket modules lose spark energy at about 4,500 rpm. These modules produce 50 percent more current than stock units, and deliver a much more precise timing signal as well as more dwell control. The coil delivers over 100 millijoules of energy across the plug gap. For strength and high rpm stability, the QPQ-treated oversized shaft is guided by a sealed ball bearing on top and long sintered bushing at the bottom. The QPQ coating provides a low-friction coating on the shaft and also makes it highly resistant to corrosion. TIG welded to the top of the shaft is an adjustable mechanical advance assembly. The distributors are supplied with extra springs and stop bushings, so you can tailor an ignition curve to match your driving needs. The advance assembly features chromoly weights that slide on nylon pads for smooth timing advancement through the entire rpm range. There is also a vacuum advance canister to improve economy while cruising. All of these features are enclosed in a great looking, billet aluminum housing that is CNC-machined for accuracy and incredible strength. The distributors come complete and ready to drop in with a high-quality rotor and cap with brass terminals for great spark transfer. Simply connect a 12 V source to the distributor and you're up and running. They're designed to replace GM HEI distributors that use a 4-pin ignition module.
( 38 )
$649.95
MSD Pro-Billet Street Distributors
MSD Pro-Billet Street distributors are a popular choice for those who desire race-proven performance for their street machine. A vacuum advance canister provides improved economy, and the proven MSD mechanical advance mechanism allows you to dial in a timing curve to fit your needs. As always, an advance kit of springs and stop bushings is included. The housing features an all-billet 6061-T6 aluminum design for accuracy to within .001 in. An oversized steel shaft is QPQ-coated for low friction, and rides in sealed ball bearings at the top and bottom of the distributor. An extra-long sintered bushing replaces the ball bearing at the bottom for Chevrolet models. This combination keeps the shaft steady, creating accurate spark delivery at any rpm. They rely on a magnetic pickup to trigger the MSD ignition control, which delivers the powerful sparks to the coil. This pickup is extremely accurate and never needs adjusting. Pro-Billet Street distributors require the use of a separate ignition box, such as an MSD 6, 7, 8, or 10 Series ignition. Order the model recommended for your vehicle and engine application.
( 116 )
$449.95
Davis Unified Ignition Dyna-Modules
Replace your stock HEI module with Davis Unified Ignition Dyna-modules for a crisper, smoother running engine. They have more electronic dwell than your stock, so the coil saturates longer and produces a more intense spark. Dyna-modules are available in different pin quantities to meet your application, and mount easily on the side of your distributor housing with minimal wiring. Quicker starting, better throttle response, and more low-end power can be gained with Performance Distributors Dyna-modules.
( 138 )
$69.99
MSD HEI Coils
MSD HEI coils increase spark energy when used with MSD HEI HEAT modules. Now you can replace your stock coil with these high-energy unitized coils for HEI distributors. They have low-inductance, high-temperature windings which charge the coil faster to give you increased spark energy at higher rpm. The premium epoxy filled construction is designed to withstand harsh race applications, as well as the wear and tear that daily usage dishes out, and still deliver more spark energy to the spark plugs.
( 40 )
$125.95
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
( 37 )
$499.95
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$549.95
On Sale
MSD Blaster GM Coils
MSD Blaster coils give your GM maximum voltage output! With windings and construction similar to MSD's Blaster 2 coils, these have an increased turns ratio, plus lower primary resistance than your stock coils. The Blasters will work with stock GM coil ignition systems, as well as MSD-equipped cars and trucks. Looking to get a little more output voltage from your GM ignition system? Just bolt in one of these MSD Blaster Coils.
( 89 )
$80.09
MSD Digital GM High Energy Modules with Rev Limiters
MSD Digital GM high-energy modules with rev limiters allow you to adjust the rpm limit between 5,000 and 9,000 rpm. True high-performance modules built for HEI distributors, they produce 50 percent higher coil drive currents than the stock module. This saturates the coil faster, which gives you more spark energy at top speeds. The results are increased horsepower and rpm range, and improved starting. When used with MSD's HEI coil, these plug-in modules create a potent high-energy spark to 9,000 rpm. MSD GM HEI modules replace all 4-pin modules used in HEI distributors with a vacuum advance canister. They can be used with factory, aftermarket, or MSD HEI distributors.
( 67 )
$181.95
MSD Iron Distributor Gears
MSD puts their years of experience to work in making these top-notch iron distributor gears. Their high grade, ductile iron is micro polished for a smooth and scuff-free finish then Melonite QPC coated to reduce friction and initial wear. Excessive clearance causes timing fluctuation throughout the rpm range, resulting in lost horsepower, so MSD also designed these oversized gears for tighter mesh between the camshaft and distributor drive gears.
( 62 )
$60.75
MSD Distributor Cap and Rotor Kits
The cap and rotor of any ignition system must be considered maintenance items. Just like when you change the oil and filter in your car, you should always replace your cap and rotor as a set. MSD makes it easy with these cap and rotor replacement kits. The correct rotor is already matched to the correct cap for you.
( 521 )
$49.95
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$129.95
Summit Racing™ High-Output 4-Pin HEI Performance Modules
Summit Racing™ high-output 4-pin HEI performance modules feature a longer dwell time for better coil saturation. This equates to a hotter spark and better performance for your HEI setup.
( 14 )
$55.99
Davis Unified Ignition Street/Strip Coil Kits
Davis Unified Ignition street/strip coil kits are capable of 7,000 rpm! The higher voltage output of these coil kits allows you to widen your spark plug gap up to .055 in. The wider plug gaps allow major spark energy into the combustion chamber for a better burn of the fuel mixture and increased horsepower. Due to the high-voltage output of the coils, a burn-through resistant brass terminal rotor is included, as well as nylon rotor screws to prevent misfires at extreme rpm. D.U.I. race coils are installed in your choice of colors, including a cool clear style so you can watch the sparks fly.
( 103 )
$105.99
Summit Racing™ Distributor Cap and Rotor Kits
Simplify your tune-ups and keep them budget-friendly with our Summit Racing™ cap and rotor kits. These affordable kits are molded from premium materials and have brass or aluminum inserts depending on application.
( 392 )
$27.99
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$54.99
PerTronix Flame-Thrower HEI III 4-Pin Ignition Modules
PerTronix Flame-Thrower HEI III 4-pin ignition modules feature multiple sparks through the entire RPM range, plus an integrated high resolution digital rev-limiter. The rev-limiter settings are displayed with a LED feedback for precise RPM settings. Adaptive dwell maintains peak energy throughout the entire RPM range, reducing misfires while improving engine performance. Peak current level is reached just prior to spark for maximum energy without the heat build-up, increasing coil performance and module reliability. The PerTronix Flame-Thrower HEI III 4-pin ignition modules adjusts spark timing at higher RPMs to compensate for the inherent electronic delay and they can sense startup and increases energy for quicker, easier starting.
( 48 )
$104.91
FAST XDi Street HEI Distributors
FAST XDi Street HEI distributors include the industry-first gear technology with an upgraded module and coil that ensure clean ignition firing up to 8,500+ rpm. Ideal for SB and BB Chevy engines, each of the XDi distributors feature a plasma nitrided gear compatible with all popular camshaft materials, including cast iron, austempered iron, 5160 steel, and even 8620 steel. The special plasma nitride process used on the gears not only increases the gear's surface hardness, but also the "slickness" of the gear teeth reducing friction and increasing cam/distributor gear life, as well as making them superior to common melonized gears. XDi Street HEI distributors also feature powerful 6-amp ignition modules that drive custom-wound performance coils up to 50,000 V, providing the hot spark needed for maximum horsepower. While ready to run out of the box, for those that enjoy tuning the mechanical and vacuum advance mechanisms for better throttle response and fuel economy, FAST XDi Street HEI distributors include springs, advanced limit plate, and instructions needed to adjust the distributor for your particular engine/vehicle combination.
( 21 )
$191.95
On Sale
ACCEL SuperStock Ignition Coils
ACCEL SuperStock coils are excellent high-performance coils. They're designed with optimized low resistance and a high turns ratio, for higher energy output. This also results in quicker starts, improved throttle response, and more high-rpm power.
( 96 )
$81.05
$35.35
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$60.79
MSD Pro-Billet Crank Trigger Distributors
MSD Pro-Billet crank distributors are built specifically for racing engines with almost no room for a distributor, due to tunnel rams or blowers. These units are equipped with a special low-profile crab-style distributor cap, allowing them to fit into extremely tight areas. The housing features two optional O-rings at the bottom that improves oil control by preventing oil pressure loss. Also, a small oil bleed hole (located in the base) sprays oil on the distributor and camshaft gears to prevent excessive wear. Since these are racing distributors, there is an adjustable slip collar to make up for engines that have had the distance between the mounting surface and the gear modified. Crowning the Pro-Billet crank distributor is MSD's own crab cap. This incorporates spark plug-style terminals for a better connection and grip to the plug wires. Order the model recommended for your vehicle and engine application.
( 20 )
$399.95
PerTronix Flame-Thrower HEI and TFI Ignition Coils
With their optimized winding design, PerTronix Flame-Thrower HEI and TFI ignition coils are a great upgrade from stock. They produce more than 50,000 V of energy to zap your plugs, for fuller, more complete combustion and better power. When used with their companion Flame-Thrower ignition modules, they produce more than twice the energy of a stock system at the plugs. They're wrapped in rugged alkyd housings and are available for both distributor-mounted and external applications.
( 64 )
$82.33
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$99.36
Proform Street/Strip HEI Distributors
Proform's Street/Strip HEI distributors have a variety of improvements over stock HEI distributors, such as a 50,000 V coil, a premium hi-dielectric cap with brass terminals, both upper and lower bushings for added durability, a low-saturation ignition module, and no voltage-reducing ballast resistors. These units offer calibrated advance curves that are optimized for maximum combustion efficiency, and the elimination of detonation damage and throttle ping. The distributors offer longer-term durability and a higher voltage spark that permits a bigger spark plug gap, resulting in more power and reduced plug fouling. The Ford models' internal coil and module make it possible for Blue Oval owners to avoid the unsightly wiring of stock Ford electronic ignitions. By eliminating the stock Ford or AMC ballast resistor, you'll get more ignition voltage, resulting in an improved spark. Another advantage to switching to HEI is access to easily-found HEI replacement parts. The Ford units are also assembled with upper and lower bushings, an upgrade from stock distributors that only have a single bushing. They're easy to install by connecting one 12 V hot wire to the distributor, making them a quick performance upgrade.
( 173 )
$240.99
Chevrolet Performance Distributor Hold-Downs
Chevrolet Performance distributor hold-downs clamp your distributor securely in place. This prevents rotation and helps to keep timing locked in place. For the best fit and function, choose genuine Chevy Performance distributor hold-downs as replacements in your GM vehicle.
( 4 )
$6.99
Summit Racing™ HEI Ignition Coils
Looking to get a faster start, quicker acceleration, and better high-rpm performance from your HEI distributor? You can have it all with Summit Racing™ HEI coils. They deliver increased spark energy--48,000 volts' worth--to give you quicker starts and better acceleration. And special low inductance, high-temperature coil windings charge the coil faster so you'll get increased spark energy at high rpms, too.
( 26 )
$31.99
