Holley EFI Coil Extension Harness - GM LS-Series - (Pair) MS277-20M or a blackout cover to

or a blackout cover to hide it completely

To correct for timing fluctuations in high-RPM racing applications

and long 17 second pulse for applications such as nitrous oxide

assortment of bump steer spacers

Holley EFI Coil Extension Harness - GM LS-Series - (Pair) MS277-20M or a blackout cover toDesigned to extend your factory coil harness, allowing you to easily remote mount your LS ignition coils. These 36" long ignition coil extension harnesses are perfect for anyone wanting to remote mount their ignition coils off of the valve covers in order to clean up the look of your engine bay. Product Description: Ignition Wiring Harness Coil Extension Harness GM LS Series Pair Holley is quickly becoming The New Standard In EFI! Holleys HP ECU is