Quote:
Originally Posted by Jim Norris
Tom,
I don't know which headers you have, but Superformance at one time offered headers with less restrictive openings. They were called the "402" headers. Ask Stephen about their availability.
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I'm not 100% certain, but I believe that later model SPFs come with the 402 header as standard equipment. My car (2613) which was shipped just over two years ago came with the 402 headers. Based on the info that I had at the time, my car was kind of on the cusp of the change.
I'll probably be seen as a heretic, but I'm going to go with quieter side pipes when I re-do mine. Even if that means giving up some HP.
