mobile madness
Well-Known Member
got these headers for my truck, hooked em up and bolted em down with stage 8 locking fasteners. all i need to do is fill the extra o2 sensor hole i dont need on the y-pipe and theres a very large threaded hole on one of the headers. is there any way i can determine what size those threaded holes are? i looked on their site,summit, and here and came up with nothing.