Custom fit, 6061 billet aluminum split face grommet to utilize factory opening in firewall of 1988-98 GM C/K 1500 OBS full size trucks. Grommet holes are designed to be used with Holley EFI (Terminator X, Dominator, HP) engine, power, and transmission harnesses.
2 hole variant grommets have: 1.0625\", and .7\" holes
To install these, remove the factory harness on the right side of the firewall, drill the 2 existing screw holes to 3/16\" to allow new 10-32 flat head screw and nylon lock nut. Firewall adapter plate attaches using these factory holes and both 2 and 3 hole split face grommets fit the same adapter screw pattern.
Proudly made in USA!
