Stock or aftermarket cats?

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05-06-2008, 01:03 AM

90notchLF

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Stock or aftermarket cats?

Im gonna get some stock cats installed this weekend. Do street legal aftermarket cats increase power or are they pretty much the same as stock cats?

Im in california so im trying to keep it street legal.

05-06-2008, 03:48 AM

lxman1

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RE: Stock or aftermarket cats?

I used a pair from these guys. Priced right and seem to flow much better than stock. http://www.bearriverconverters.com/

I used the small series.

05-06-2008, 09:14 AM

90notchLF

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RE: Stock or aftermarket cats?

But in general do street legal aftermarket cats offer better perfromance over stock cats? or is the difference not really noticable?

05-06-2008, 04:09 PM

OnyxCobra

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Location: Rochester, NY

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RE: Stock or aftermarket cats?

the stock H pipe is pretty restrictive, there are gains to be had with offroad or high flow cats.

05-06-2008, 05:46 PM

camaroeater

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Location: Phoenix, AZ

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RE: Stock or aftermarket cats?

Stock H pipes have 4 cats...aftermarket have 2...so going w/ an afermarket will give you more power, plus it will be noticebly louder. Idsave your selftime and money and go w/ anO/R midpipe.

05-06-2008, 10:24 PM

90notchLF

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RE: Stock or aftermarket cats?

Quote:

ORIGINAL: camaroeater

Stock H pipes have 4 cats...aftermarket have 2...so going w/ an afermarket will give you more power, plus it will be noticebly louder. Idsave your selftime and money and go w/ anO/R midpipe.

But that stuff is not legal down here in California.

05-07-2008, 04:05 AM

92Rideagain

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RE: Stock or aftermarket cats?

Quote:

ORIGINAL: 90notchLF

Im gonna get some stock cats installed this weekend. Do street legal aftermarket cats increase power or are they pretty much the same as stock cats?

Im in california so im trying to keep it street legal.

Check with BBK they make some high flow cats that are Carb legal in Cali. If you made any mods to the top end of yourmotor then you would not want the stocker choking down any gains that you have made.