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Cutout Size

This is a discussion on Cutout Size within the External Engine forums, part of the LSx Technical Help Section category; My cutout sounds amazing with high flow cats and LT's. When I tried swapping out my cats for straight pipes, ...

  1. #21
    Junior Member
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    Feb 2006
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    NH
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    Red
    2000 SS

    My cutout sounds amazing with high flow cats and LT's. When I tried swapping out my cats for straight pipes, the exhaust note was very raspy at idle and my track times actually decreased. On top of that I was starting to feel guilty setting off other people's car alarms almost every day. With the high flow cats in......I may set off a car alarm once every other week or so. Mine is installed under the passenger side rear seat.

  2. #22
    Junior Member
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    Jan 2007
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    SIUC
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    Silver
    2002 Camaro

    in the i pipe added two mph at the track...with back to back runs...went 110 with it shut and 112 with it open...about 20 rwhp gain although i do have a 3.5 in cutout that merges to a 3 in y pipe...check out ebay for my cutout i bought...bestflowing out there for outr cars
    Last edited by chrs1313; 02-13-2007 at 04:31 PM.

  3. #23
    Senior Member ss~zoso~ss's Avatar
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    SS: NBM, tan top
    1998-SS, 2010 Jetta TDI

    right....

  4. #24
    Junior Member
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    Jan 2007
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    Silver
    2002 Camaro

    Quote Originally Posted by ss~zoso~ss View Post
    right....
    what are you doubting i can show you time slips for proof 2mph difference...look on ls1 tech i have one of the fastest SI cars and i did that time with stock manifolds, and stock exhaust with only a cutout and other bolt ons...i have time in my sig on there and all info about the car 11.72 at 115.4 mph on manifolds at 3365 raceweight, stock 3.23 gears and only a 3600 stall...check it out best catback there is a cutout for the money and hp gains...bottom line

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