Muffler or No Muffler - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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post #1 of 30 Old 05-21-2009, 08:30 AM Thread Starter
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Muffler or No Muffler

I just received my 4" MBRP Dual Exhaust. I also ordered the CAT delete. Should I also go with the muffler delete? I was told it would be very loud but wouldn't it help keep EGT down? Thanks for the help.

HIVOLTS



'06 F-350 6spd Manual Crew Short bed
Bully Dog Cold air intake with S&B filter; MBRP 4" Dual Exhaust - Turbo Back - Straight Piped, Edge Insight Monitor w/Probe, SCT X3 with tunes by Eric at Innovative Diesel Powermax Turbo with MTW Billet Wheel
Jesse James Black Widows with BFG AT KO 325/65R18
ARP studs/OEM Gaskets; Liberator EGR delete
6.4 Banjos and upgraded FPR; Driven Diesel regulated return with sump and Airdog 150; Warren's 175/75 injectors.
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post #2 of 30 Old 05-21-2009, 09:00 AM
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i've straight piped my stock piping and it sounds real good just cruising around town and on the highway. not loud at all. However if you mash on it and get in the higher RPM's it gets pretty loud and raspy. I would say unless you have an issue of getting pulled over by police for loud exhaust then you should be fine with straight pipe no muffler.

eventually i'm going to upgrade to a 4" DP and 5" DP back exhaust with a magnaflow muffler. the muffler should help keep it from being excessive in the higher rpms.

-Aaron

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'07 F-250 PowerStroke - 5" MBRP Straight Pipe, Edge Insight, Eric Tuned SCT, HID's, 2.5" Newton Lift w/ 4" rear block and Icon Caster Sleeves, Bilstein 5100's, 18" XD Monster's w/35" Toyo M/T.
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post #3 of 30 Old 05-21-2009, 09:27 AM
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CAT Delete and a good straight through muffler..... Straight piping is good but the the sound of a good muffler is better to me. Definatley no kitty....

04.5 LLY DURAMAX. EFI, AIR, FUEL, TRACTION AND MORE! POWERSTROKE SLEEPER SLAYER!!
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post #4 of 30 Old 05-21-2009, 09:29 AM
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I would delete them both. Your truck will sound good.

2000 F-250 216k- smoke much?


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post #5 of 30 Old 05-21-2009, 09:38 AM
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Im running a 5" with no muffler or cat and it sounds great! Definately delete them both

99.5 F-250 Lariat 4x4 CC
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post #6 of 30 Old 05-21-2009, 09:48 AM
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I have punched out the cat and did the muffler delete and I love it!!! I will agree that is you get agressive with the go pedal it will sound off, but then that is the coolness factor of doing it!!! If it's too loud your too old I have the MBRP down pipe in my back seat waiting on time to get it installed.

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post #7 of 30 Old 05-21-2009, 11:06 AM
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yeah, i'm all for gettin' rid of my muffler! that's gonna be my next thing I do. The kitty is gone, just gotta get the behemoth of a muffler gone too

Kyle

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post #8 of 30 Old 05-21-2009, 11:08 AM
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post #9 of 30 Old 05-21-2009, 11:13 AM
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i deleted both and cruising around its not bad. if you stomp on it yeah it gets loud. now when im towing it kinda gets annoying on long trips but other than that its not bad
post #10 of 30 Old 05-21-2009, 11:13 AM
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I agree no kitty no muffler. It is awesome when you floorboard it going through a tunnel.

Josh

04 F350 CC SB DRW IT HAS SOME STUFF

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