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Old 10-09-2008, 06:25 AM
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exhaust question

I have deleted the muffler on my factory exhaust. I am planning on deleting the cat as well.


How much more flow would I get if I had a straight piped 4" turbo back exhaust over just straight piping my factory exhaust?


thanks for any responses.
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Old 10-09-2008, 06:46 AM
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I would try a CAT delete pipe first. I put a gutted CAT on mine along with my muffler delete and I really do not like the sound. The muffler delete by itself sounds great, without the guts in the CAT it sounds like a fart can.
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Old 10-09-2008, 06:49 AM
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4in is over kill. Remove the cat.
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Old 10-09-2008, 10:01 AM
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I dont think you will notice any power difference but a 4" turbo back will lower your EGT's considerably. That is pretty important if you are running a tuner.
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Old 10-09-2008, 05:00 PM
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i agree with shep1824. u want to keep those egt's low when running a programmer.
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