Holley EFI - For use with Holley® HP and Dominator ECUs and other EFI systems Do you need to a

Do you need to a bronze gear for your billet cam

Spark Plug - NGK Laser Iridium - 14 mm Thread - 17

Notes: Fits standard cab/short bed models

3 - Fire Retardant Cotton - Black - X-Large - Each

Introducing our new Outlaw Extreme Cat-back system for the 2014-2019 GM Silverado/Sierra 1500 with the 4

Holley EFI - For use with Holley® HP and Dominator ECUs and other EFI systems Do you need to aHP Smart Coil ignition sub harness. Includes a pair of coil harnesses for an 8 cylinder engine. These harnesses are similar in design to factory GM LSx coil harnesses, but plug into Holley HP Smart Coils. They plug into Holley LSx plug and play main harnesses if one wants to replace factory LSx coils with Holley HP Smart Coils. If using a non LSx main harness, purchase PN 558 307 for connectors, wiring, terminals to connect directly to a Holley HP or