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Free Flowing Catalytic Converters

This is a discussion on Free Flowing Catalytic Converters within the External Engine forums, part of the LSx Technical Help Section category; Is there a worthwhile RWHP gain by installing Free Flowing Catalytic Converters. I have PS Shorties and Hooker CB already ...

  1. #1
    Member 89LX's Avatar
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    Free Flowing Catalytic Converters

    Is there a worthwhile RWHP gain by installing Free Flowing Catalytic Converters. I have PS Shorties and Hooker CB already installed. Worth the trouble or leave it alone?
    2000 Z28 M6, SLP Lid, SLP Bellows, SLP UD,
    P&P Maf, TB By-Pass, PS Shorties, LS6 Intake, FAST 78mm TB, Hooker CB, Hurst Billet, Front Tower Brace, small 218/218....527/527....114 cam.
    337rwhp/348rwtq

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    Senior Member INMY01TA's Avatar
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    Stock cats flow pretty good. Not worth the $ imo.

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    Pathelogical Liar BlackLT1Z28's Avatar
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    Yeah, there are better things out there to spend your money on.

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    Nitrous Tuner LS2Tuner's Avatar
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    Quote Originally Posted by 89LX View Post
    Is there a worthwhile RWHP gain by installing Free Flowing Catalytic Converters. I have PS Shorties and Hooker CB already installed. Worth the trouble or leave it alone?
    It all depends........ How many miles are on it.....?
    Yes you can gain power with them. And they are ALOT cheaper than they were.
    Don't be afraid of the bottle!!! Be afraid of your tune!!!

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    Senior Member INMY01TA's Avatar
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    Why not just go with an off road y pipe? Cheaper and better gains.

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    Nitrous Tuner LS2Tuner's Avatar
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    Unfortunately Some of us have emissions......
    Not to mention street raceing task force that go's around pulling us over and braeks out a mirror and temp. gun and shots that empty cat.....When the temp is the same as the pipe.....=It's empty and going to the pound......And fines.

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    Senior Member INMY01TA's Avatar
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    Ya well he lives in N Carolina, not Cali. I haven't had cats on mine for 5 years. (passed emissions twice) Cali is gay.

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    Member 89LX's Avatar
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    opted to stay legal

    I know that there is more power with LT's but opted to stay legal in case the inspection criteria gets tougher here. They normally don't raise the car here and use the plug. However if they happen to raise the car and there are no CATS (or they are moved) you "will" fail. I won't see the track but do enjoy giving the rice burners a fit at age 63 yrs young. Thanks for the insight.

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    Senior Member INMY01TA's Avatar
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    I'm saying why not just keep the manifolds on and get an ory pipe. Not hard to change out every other year for emissions.

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