Collection: AFTERMARKET ENGINE & TRANSMISSION ACCESSORIES

Premium Aftermarket Accessories for GM Engine and Transmission

Upgrade your vehicle’s performance with high‑quality aftermarket engine and transmission accessories designed for durability, precision, and power. From performance intakes and cooling components to upgraded clutches, torque converters, sensors, and mounts, our products help drivers get more reliability and responsiveness out of every ride.

Whether you’re restoring a classic, building a track-ready setup, or just improving daily drivability, our selection delivers enhanced horsepower, smoother shifting, better heat management, and longer component life. We focus on trusted brands, proven engineering, and parts that fit right the first time—so you can maintain, customize, or optimize your vehicle with confidence.

 

Enhance Performance with GM Engine Components

 

 

Aftermarket accessories designed for your GM engine can significantly improve overall vehicle performance and reliability. Whether you seek better fuel efficiency or increased horsepower, compatible engine parts offer tailored solutions for maintenance and upgrades. Choosing high-quality GM engine accessories ensures seamless fitment and durability, helping your vehicle perform at its best for longer periods. These components are engineered to meet or exceed OEM specifications, offering peace of mind while optimizing your engine’s power and longevity on the road.

 

 

Durable and Efficient GM Transmission Parts

 

 

Maintaining or upgrading your GM transmission with aftermarket accessories provides improved shifting smoothness and enhanced transmission life. These parts are crafted for durability and precision, ensuring reliable power transfer from engine to wheels. Selecting the right GM transmission accessories helps prevent costly repairs by reducing wear and tear. OEM-quality alternatives offer a cost-effective way to keep your transmission running efficiently without sacrificing performance or compatibility with your vehicle’s systems.

 

 

Benefits of Upgrading Your Engine and Transmission

 

 

Upgrading both your engine and transmission with aftermarket accessories can greatly improve your vehicle’s responsiveness and fuel economy. Well-selected parts contribute to reduced mechanical stress and heat generation, extending the lifespan of critical components. Such enhancements not only boost driving enjoyment but also preserve the value of your vehicle. By investing in quality GM engine and transmission accessories, you ensure your vehicle performs reliably, maintains smooth operation, and meets the demands of everyday driving and performance needs alike.

 

 

 

Enhance Performance with GM Engine Components

 

 

Aftermarket accessories designed for your GM engine can significantly improve overall vehicle performance and reliability. Whether you seek better fuel efficiency or increased horsepower, compatible engine parts offer tailored solutions for maintenance and upgrades. Choosing high-quality GM engine accessories ensures seamless fitment and durability, helping your vehicle perform at its best for longer periods. These components are engineered to meet or exceed OEM specifications, offering peace of mind while optimizing your engine’s power and longevity on the road.

 

 

Durable and Efficient GM Transmission Parts

 

 

Maintaining or upgrading your GM transmission with aftermarket accessories provides improved shifting smoothness and enhanced transmission life. These parts are crafted for durability and precision, ensuring reliable power transfer from engine to wheels. Selecting the right GM transmission accessories helps prevent costly repairs by reducing wear and tear. OEM-quality alternatives offer a cost-effective way to keep your transmission running efficiently without sacrificing performance or compatibility with your vehicle’s systems.

 

 

Benefits of Upgrading Your Engine and Transmission

 

 

Upgrading both your engine and transmission with aftermarket accessories can greatly improve your vehicle’s responsiveness and fuel economy. Well-selected parts contribute to reduced mechanical stress and heat generation, extending the lifespan of critical components. Such enhancements not only boost driving enjoyment but also preserve the value of your vehicle. By investing in quality GM engine and transmission accessories, you ensure your vehicle performs reliably, maintains smooth operation, and meets the demands of everyday driving and performance needs alike.

 

 

993 products

993 products

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  • HP Smart Coil Ignition Harness

    Regular price $299.95 USD
    Regular price $337.95 USD Sale price $299.95 USD
    HP Smart Coil Ignition Harness for Holley EFI, automotive service part by The Tuner Store, showing the coil wiring connectors.
    Sale
  • Holley Sniper EFI 2GC Large Bore - Classic Gold

    Regular price $1,399.95 USD
    Regular price $1,574.95 USD Sale price $1,399.95 USD
    Holley Sniper EFI 2GC Large Bore Classic Gold kit with electronic fuel injection components and wiring for performance engine tuning.
    Sale
  • Holley Sniper EFI 2GC Small Bore - Classic Gold

    Regular price $1,499.95 USD
    Regular price $1,687.95 USD Sale price $1,499.95 USD
    Holley Sniper EFI 2GC Small Bore Classic Gold kit with throttle body and wiring for fuel injection conversion.
    Sold out
  • Holley Sniper EFI 2GC Large Bore Master Kit- Classic Gold

    Regular price $1,749.95 USD
    Regular price $1,968.95 USD Sale price $1,749.95 USD
    Holley Sniper EFI 2GC Large Bore Master Kit in classic gold, including fuel injection components and accessories.
    Sale
  • Holley Sniper EFI Stealth 4500 - Black

    Regular price $2,299.95 USD
    Regular price $2,587.95 USD Sale price $2,299.95 USD
    Black Holley Sniper EFI Stealth 4500 kit with fuel injectors and accessories, designed for high-performance fuel injection systems.
    Sold out
  • Holley Lo-Ram Manifold Base and Fuel Rails Single Fuel Injector GM LS3/L93

    Regular price $764.95 USD
    Regular price $860.95 USD Sale price $764.95 USD
    Holley Lo-Ram manifold base and fuel rails with single fuel injector for GM LS3/L93, aftermarket EFI intake manifold.
    Sale
  • Holley Intake Manifold Adapter Plates

    Regular price $425.95 USD
    Regular price $479.95 USD Sale price $425.95 USD
    Holley EFI intake manifold adapter plates for Holley intake manifolds, designed for custom engine setups.
    Sale
  • Holley EFI Terminator X Stealth 4150 Secondary Throttle Body - Gold

    Regular price $1,171.95 USD
    Regular price $1,318.95 USD Sale price $1,171.95 USD
    Holley EFI Terminator X Stealth 4150 secondary throttle body in gold, automotive EFI service part with detailed throttle plate and mounting features
    Sale
  • Holley Smart Coil Remote Coil Relocation Brackets

    Regular price $249.95 USD
    Regular price $281.95 USD Sale price $249.95 USD
    Holley Smart Coil remote coil relocation brackets for ignition coils, shown on a vehicle engine for improved ignition system setup.
    Sale
  • Holley Lo-Ram Manifold Kit Dual Injector- Black - GM LS3/L92

    Regular price $1,299.95 USD
    Regular price $1,462.95 USD Sale price $1,299.95 USD
    Black Holley Lo-Ram EFI intake manifold kit with dual injectors for GM LS3/L92 engines, featuring sleek design and precise fit.
    Sale
  • Holley Lo-Ram Manifold Kit Single Injector- Satin - GM LS3/L92

    Regular price $999.95 USD
    Regular price $1,124.95 USD Sale price $999.95 USD
    Satin Holley Lo-Ram manifold kit with single injector for GM LS3/L92 engines, designed for EFI intake applications.
    Sale
  • Holley EFI Terminator X Stealth 2x4 4500 Kit - Black

    Regular price $3,949.95 USD
    Regular price $4,443.95 USD Sale price $3,949.95 USD
    Holley EFI Terminator X Stealth 2x4 4500 kit in black, includes electronic fuel injection components for racing engines.
    Sale
  • Holley EFI Terminator X Universal MPFI Kit

    Regular price $1,599.95 USD
    Regular price $1,799.95 USD Sale price $1,599.95 USD
    Holley EFI Terminator X Universal MPFI Kit with wiring and components for engine management and fuel injection system.
    Sale
  • Holley Single Plane EFI Intake - GM LS3/L92 - Black

    Regular price $584.95 USD
    Regular price $658.95 USD Sale price $584.95 USD
    Black Holley Single Plane EFI Intake Manifold for GM LS3/L92 engines, showcasing the sleek finish and design details.
    Sale
  • Holley EFI Terminator X Stealth 4150 Secondary Throttle Body - Polished

    Regular price $1,171.95 USD
    Regular price $1,318.95 USD Sale price $1,171.95 USD
    Polished Holley EFI Terminator X Stealth 4150 secondary throttle body for EFI tuning and performance upgrades.
    Sale
  • Holley Lo-Ram Manifold Base and Fuel Rails Single Fuel Injector GM LS3/L92

    Regular price $699.95 USD
    Regular price $787.95 USD Sale price $699.95 USD
    Holley Lo-Ram intake manifold base with fuel rails and single fuel injector for GM LS3/L92 engines, installed on a performance engine.
    Sale