4" or 5" exhaust ?? - Ford Powerstroke Diesel Forum
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Old 03-12-2011, 06:03 AM
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4" or 5" exhaust ??

OK well i'm looking at exhaust and i notice about a $100 difference between 4" and 5". Going to go with turbo back stright pipe (cat and muffler delete) from diamond eye. Is 4" more than plenty or would i benifit from 5" ? Motor is stock, just plan to add some street/MPG tunes but i tow with it 90% of the time. I dont mind the sound but dont want it to be really annoying like straight pipe 8" stacks. Any advice is appreciated.
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Old 03-12-2011, 06:36 AM
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yes 4" is plenty 4" will really help your egt's.
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Old 03-12-2011, 06:48 AM
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I'm happy with the 4" diamond eye I put on, not much louder at idle but when you get on it def. sounds nice. I got the muffler on there too, supposedly helps with the drone during towing, but I haven't towed with it yet.
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Old 03-12-2011, 08:06 AM
th3 th3 is offline
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i started out with a 4" turbo back kitty toss and muff delete, but after a while the loudness of the turbo whine and exhaust started to wear on me. i installed the muff that came with the pipe kit and now i am happy with it.
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