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Thread: 2.5" mandrel bent cat back straight pipe.

  1. #31
    Senior Member Pete's Avatar
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    Quote Originally Posted by IMPUL View Post
    I've noticed less restriction 3.5k-redline with no noticeable difference below 3.5k rpm
    Cool because that is exactly the rpm that I feel the biggest difference with my timing advanced. Maybe when I get mine breathing through something a little bigger than the dirt devil vacuum hose sized stock intake and exhaust the gains should be even more noticed.



  2. #32
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    I think the straws at McDonald's are bigger then that



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