Header

I have a 91 civic hb with a b16a1. What aftermarket headers can be used with minor modifications? It has 2 O2 sensors.

well only problem is, is that most aftermarket headers only come with one O2 sensor bung on them, so either you would have to weld another on, or splice the wiring for the two sensors together. Any Header for a 94-95 Del Sol VTEC, or the 99-00 Civic Si, should be a bolt on affair.