Will a header made for a '97-'00 base model fit on a 4th gen VTEC ok? The exhaust on the 4th gen is being replaced with custom piping, so if the fitment problem is on the cat. side, its not a problem....
No, they will not fit fine. The primary pipes will fit fine, but the secondaries, will not. They are different lengths. If I remember right the 5th gen has a longer secondary than the 4th, and you would have to cut, shorten and reweld the flange.
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