These coils mount directly in place of factory style versions and accept the OEM connectors as well. Performace output is improved thanks to a careful selection of better materials and...

The Edge Evolution CTS3 is the most advanced flash tuner and digital monitor available for GM gas applications, delivering proven performance and control for Silverado, Sierra, Tahoe, Suburban, and Yukon...

Holley's cast aluminum valve covers for GM LS engines provide a fresh, refined look without the need to relocate the coils. There's no question the factory "coil on cover" design...

Black oxide finished carbon steel header bolts have a compact hex head and the flange is ideal for use where space is minimal - your typical header flange. Includes twelve...

Look no further when it's time to tune-up your LS! Bolt on legendary ignition performance with MSD's direct replacement coils. Reliable parts from the ignition leader at a price that...

Engineered from the inside out, the 8.5 offers everything you have ever wanted in a wire; incredibly low resistance without electronic interference! In a single 11 inch length of Super...

Engineered from the inside out, the 8.5 offers everything you have ever wanted in a wire: incredibly low resistance without electronic interference. In a single 11-inch length of super conductor...

ACCEL now offers the cure for burnt spark plug wire boots with Extreme 9000 Ceramic Wire kits. The 8mm Ferro-Spiral core wire now has ceramic boots on the spark plug...

Engineered from the inside out, the 8.5 offers everything you have ever wanted in a wire, incredibly low resistance without electronic interference! In a single 8 inch length of Super...

The all-new Dashpaq+ for Diesel: As our very first touch screen monitor and tuning device, Dashpaq+ for Diesel builds off of 20+ years of engineering and tuning calibration specific to...

Holley's tall LS valve covers are the latest addition to our extensive line of LS engine components that will add a custom touch to your engine bay and help you...

Engineered from the inside out, the 8.5 offers everything you have ever wanted in a wire; incredibly low resistance without electronic interference! In a single 8 inch length of Super...