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 Post subject: downpipe/cat
PostPosted: Thu Dec 03, 2009 9:47 pm 
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Age: 53
Name: Timmy
Does Magnaflow or any other exhaust supplier offer a downpipe/hi-flow cat combo similar to the ones for the 3800?...or did GM actually get wise and put a good flowing pipe and cat on the LS4 to begin with?

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 Post subject: Re: downpipe/cat
PostPosted: Thu Dec 03, 2009 10:27 pm 
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Name: Joe
The u-bend on our cars isnt as bad as the 3800's, and the cats are average. Hogan performance makes catted and straight pipes for the LS4's, and seem to bee good quality.


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 Post subject: Re: downpipe/cat
PostPosted: Sat Dec 05, 2009 10:46 pm 
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Name: Cori Grauberger
The LS4 have a high flow cat from the factory, no U-bend really to speak off, So they did alot better job than the old 3.8's


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 Post subject: Re: downpipe/cat
PostPosted: Wed Dec 30, 2009 9:01 am 
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Name: Kansas GXP
The most restrictive thing on the LS4 exhaust, is the cross over. I have talked with Hogan a couple of times about making one of these for our cars, but not sure if he has found a donor car to make one or not. I can't afford to go without my car for a day or two, or I would just drop it off at his shop.

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 Post subject: Re: downpipe/cat
PostPosted: Sat Mar 06, 2010 9:26 am 
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Location: Nova Scotia Canada
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Name: dave
Has everyone who put on the down pipe had the code show up and if so is it hard to get rid of


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 Post subject: Re: downpipe/cat
PostPosted: Sat Mar 06, 2010 12:59 pm 
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Name: Justin
Only reason I have a code is because I'm running catless, all you have to do is have somebody with a tuner tune out the second O2 sensor, I believe.


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