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pacesetter

  1. mobile madness

    pacesetter 70-1170 on 91 4.0 help

    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...

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