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Custom y pipe, no cats = hp gain of??

This is a discussion on Custom y pipe, no cats = hp gain of?? within the External Engine forums, part of the LSx Technical Help Section category; I just went in and had a new y pipe made and cats cut out. Car sounds better, more power, ...

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    Custom y pipe, no cats = hp gain of??

    I just went in and had a new y pipe made and cats cut out. Car sounds better, more power, but how much roughly did i gain??

  2. #2
    Jesus died to save you! Killer_bluebird's Avatar
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    Probably about 10-12hp to the wheels. I gained 16.4 rwhp and 13.4 rwtq with a Bassani ORY and a Borlamouth (XR-1 Race muffler) over my stock set up.
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    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by In_style
    I just went in and had a new y pipe made and cats cut out. Car sounds better, more power, but how much roughly did i gain??
    stock cats flow rather well. im guessing you gained no more than sigle digits.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

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