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Old 07-08-2011, 11:31 PM   #1
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I recently purchased pacesetter shorty hearders and I think I will just get the entire exhaust redone. I have cat back dual magna flow exhaust now. I would like to try and keep the trouble codes down to a min if possible. I was told I should keep my stock cat as that will help with the trouble codes. Would you guys recommend getting a performance cat and just have them split from there. Any suggestions?

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Old 07-08-2011, 11:31 PM   #2
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I recently purchased pacesetter shorty hearders and I think I will just get the entire exhaust redone. I have cat back dual magna flow exhaust now. I would like to try and keep the trouble codes down to a min if possible. I was told I should keep my stock cat as that will help with the trouble codes. Would you guys recommend getting a performance cat and just have them split from there. Any suggestions?
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Old 07-09-2011, 02:36 AM   #3
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If you go with aftermarket cats, you'll pop a DTC. You can use an O2 sim which helps... Duane at 3rd Strike carries them.

MPO, I'd keep the stock cats - the HP gains with aftermarket cats are minimal and not worth the cost & hassle!
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Old 07-09-2011, 03:37 AM   #4
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Ok yea thats what I heard. That would just mean i'd have to buy something else for exactly like u say a minimal gain. It might possibly sound a lil different but not worth worth it regardless. Thank you.
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Old 10-02-2011, 03:33 PM   #5
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I played with my exhaust some a few years ago and replaced the 03 single cat with what I thought was a Hiflow Magnaflow cat. I was datalogging 0-60 mph times a lot and the Magnaflow cat cost me 3 tenths of a second. IMO, the stock 03 cat is designed as a single cat and flows great. Now if you used two of them IMO you would have a very free flowing system.

here is a picture of two 03 cats that I cut to accept 3" pipe.


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