Straight pipe vs Aftermarket muffled - Ford Powerstroke Diesel Forum
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Old 06-06-2010, 07:11 PM
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Straight pipe vs Aftermarket muffled

Is there a difference in EGT/power/fuel economy? I was looking into a 4" turbo back for my 2000 7.3 and am trying to decide on whether to go get a mbrp or other exhaust system, or take it to the local muffler shop and have him just do a 4" straight pipe.

Thanks all for the information put on this website, tons and tons of knowledge on here that is just great for someone getting into their first PSD
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Old 06-06-2010, 07:55 PM
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i have had an 03 dodge cummins with lots of mod and now i have a 7.3 stock and the diff in money you will spend on a full out turbo back system is not worth it in my book. they both will lower temp reduce back pressure and give a little bit of power diff. i can tell you when i had my cummins my buddy had the same setup as me only he spent 5 or 6 hundred on a exhaust system and neither one of us could tell the diff except for sound. id cut the muffler out and straight pipe it and put the extra you were goin to spend on a tuner or some gauges. just me tho.
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Old 07-20-2010, 04:58 PM
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rollin smoke diesel has a cheaply priced kit for 4 and 5 inch turboback straight pipe systems

Rollin Smoke Diesel. 1999-2003 Ford 7.3L Powerstroke RSD Performance 4" Turbo Back Straight Pipe

Rollin Smoke Diesel. 1999-2003 Ford 7.3L Powerstroke RSD Performance 5" Turbo Back Straight Pipe
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Old 07-20-2010, 08:30 PM
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i just bought my truck, and in my searching and test drives i drove one with no muffler. i thought it sounded bad and was too loud. on my tuck i have a 4" banks turbo back but i have a magnaflow muffler. nice turbo whistle, no droning, and on hard acc. you get a good exhaust growl. ill do it again if/when this one rots away
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Old 07-20-2010, 09:27 PM
SJB SJB is offline
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Order a straight thru Walker BTM muffler off of RockAuto Auto Parts for $46 plus shipping. Gives you the straight thru performance and a descent sound. I've read and talked to others that said there wasn't much difference between going to a 4" to 5" full system other than sound and a lot more money. I'm happy with my setup, and did it myself for cheap.
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Old 07-21-2010, 11:37 AM
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diy straight pipe. got a piece of 3.5 pipe and welded it in .
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Old 07-21-2010, 03:01 PM
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No difference between them except with a muffler you can tow without being driven nuts in the canyons
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Old 07-21-2010, 09:36 PM
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Quote:
Originally Posted by CT Performance, Inc. View Post
No difference between them except with a muffler you can tow without being driven nuts in the canyons
yeah when im towing up a mountain lets say you can definitely hear me coming.. haha!
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Old 07-22-2010, 03:22 PM
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Quote:
Originally Posted by Dietoremain View Post
diy straight pipe. got a piece of 3.5 pipe and welded it in .
agree..

The only diff your going to get with a 4" turbo back is a slight..slight drop in EGT's, the stock exhaust with a muffler delete pipe is good for about 400HP..trust me youll need alot to get to 400HP by then youll put an exhaust on lol

the 4" also has a deeper tone, the 5" even deeper, id never go smaller then 5" now..
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Old 07-22-2010, 03:34 PM
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No problems making way over 400HP with a 4" full system heck its been done on the stock 3.5" years ago. Masami made just over 400 hp reliably on a downpipe, stock midpipe and muffler and a replacement mandrel bent 3.5 inch tailpipe. You do not have to replace the entire exhaust..
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