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post #1 of 5 Old 10-09-2008, 06:25 AM Thread Starter
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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.

2007 F-250 Crew Cab King Ranch

zoodad mod done

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muffler and cat delete (stock exhaust)

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SCT X3 with Innovative Tunes
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post #2 of 5 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.

2005 F-350 Super Crew SB
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post #3 of 5 Old 10-09-2008, 06:49 AM
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4in is over kill. Remove the cat.

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post #4 of 5 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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post #5 of 5 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.

2007 F-250 Lariat 6.0L CC/SB/FX4
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4in TB MBRP Exhaust -Straight Pipe
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