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No-Cats + Non-Mandrel Bent VS Mandrel Bent.

This is a discussion on No-Cats + Non-Mandrel Bent VS Mandrel Bent. within the External Engine forums, part of the LSx Technical Help Section category; Well, I've noticed a few people at my college that I've seen around town a lot that are driving their ...

  1. #1
    Join Date
    Jun 2007

    94 z28

    No-Cats + Non-Mandrel Bent VS Mandrel Bent.

    Well, I've noticed a few people at my college that I've seen around town a lot that are driving their old beat up cars without their cats. I'm 99% sure we DO have to have them, so I'm thinking maybe the cops around here just don't pay attention considering how long they've been doing this.

    So to get to the point. I may have the chance to make a free full exhaust system(no headers) in the auto shop but it will not be mandrel bent. The thing wouldn't have a cat either. So which would actually give a better performance? No cats and non-mandrel bent(so it will have a little bit of back pressure) or a mandrel bent system with cats?

  2. #2
    LoudMouth SStriker's Avatar
    Join Date
    Jul 2006
    Westminster/Sykesville, Maryland

    2000 Trans Am

    Shit your stock exhuast is probly mandrel i know mine was. I would just delete the cats and Muffler if you want a better flowing exhuast.

  3. #3
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
    Join Date
    Oct 2006
    doylestown, Pa

    2004 CTS-V

    I have witnessed an 8 horsepower gain just from installing mandrel bent pipes coming off of manifolds 3 feet back. Now a complete system is a different story. I have seen gains of 10 to 15 horsepower. Most high flow cats do not rob to much power so you are best doing both.

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