4" or 5" exhaust - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

 
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post #1 of 10 Old 11-16-2011, 12:36 PM Thread Starter
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4" or 5" exhaust

i know this subject has been touched a lot but just a quick question i have checked youtube videos and i have not been able to really tell much of a difference in noise. i can get a mbrp 4" straight pipe for $200. or i can get a 5" straight pipe for $320. is the sound difference between the 2 worth $120? i like a lot of turbo noise and not as worried about the groan yea i would like it to have groan but not as worried about the loudness of it vs the whistle.

03 F350 6.0 SRW 4X4 lariat

481hp 832tq

8" super lift 385/70r16 Toyo MT's
FatBoy traction bars
Durastroke stg1
intake
MBRP 5" straight pipe
Custom tuned by Vivian "Looney Wild Track"
Edge Insight CTS
Zoodad mod
high idle mod
6.4 banjo bolts
Updated fuel pressure regulator (Blue spring mod)
EGR cooler delete
6K 55w HID's
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B&W turnover ball


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post #2 of 10 Old 11-16-2011, 12:40 PM
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a lot people will say the 4 inch whistles more.. i have a hard time figuring how that is.. the 5 inch will give you a deeper tone.. i would get 5 inch cause of looks and so in a year you dont look back and wish you would have spent the 100 bucks and got 5 inch

2008 f250 ccsb 4x4 lariat.. 8 inch lift, 24in fuel hostage, 40in ss m16, Arp studs, egr delete, street diesel performance down pipe, intake elbow and cac pipe, Diesel site boots, xrt pro with kem tunes, s&b intake, 5 inch exhaust, edge cts, tinted mirror lights, pioneer 8400 double din, hid headlights and fogs, two jl audio 13tw5 with rockford 1500 watt amp, jl audio door speakers and tweeters, prestige 2 way alarm and remote start.

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post #3 of 10 Old 11-16-2011, 12:57 PM Thread Starter
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I understand what you are saying but if the whistle sound is minimal than I'll go with 4" and plus I have to convince the wife of spending the money and I'm thinking 200 will be easier

03 F350 6.0 SRW 4X4 lariat

481hp 832tq

8" super lift 385/70r16 Toyo MT's
FatBoy traction bars
Durastroke stg1
intake
MBRP 5" straight pipe
Custom tuned by Vivian "Looney Wild Track"
Edge Insight CTS
Zoodad mod
high idle mod
6.4 banjo bolts
Updated fuel pressure regulator (Blue spring mod)
EGR cooler delete
6K 55w HID's
6k 35w fog HID's
B&W turnover ball


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post #4 of 10 Old 11-16-2011, 01:35 PM
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Do you do alot of towing with the truck? If so, I would recommend a muffler, it can get pretty obnoxious.....

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post #5 of 10 Old 11-16-2011, 01:38 PM
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You have an 03. The turbo is gonna whistle like a jet no matter what hahaha. I kick my self for not going 5". For looks mainly it just looks sick and 5-6" tip flows better than my 4-6" tip. 1" difference isn't going to kill the whistle. Also the bigger the exhaust the less raspy the 6.0 bark is. If looks don't bother u then 4" is perfect. Sound isn't much affected and mbrp has 3.5" down pipe so no matter what I believe it's 3.5 until the tranny cross member but I dont know. I have diamond eye which is 4" all the way back

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post #6 of 10 Old 11-16-2011, 02:02 PM
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I just put a 4" turbo back straight pipe W/ 5" tip and it sounds great!!! I have a ton of turbo noise and a nice deep tone when driving... When I'm idling, it sounds like a fighter jet ... My friend has an 03' with the same exhaust and the turbo sound is ridiculously bad a$$...



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37" Toyo Open Country MT
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4" Turbo Back W/ 5" tip
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post #7 of 10 Old 11-16-2011, 03:26 PM
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No MBPR has a 4" turbo back because I have it on my truck.

2006 F250 King Ranch 6.0L - 2.5" Leveling Kit w/ 4" rear blocks, ARP Studs, EGR Delete, 4" TB MBPR Straight Exhaust, SCT Tuner w/ Quick Tricks, Innovative, and Gearhead tuning, Blue Spring Upgrade, Dieselsite Coolant Filter, ScanGuage II, Dyno-Tune EGT guage, High Idle, Custom Wood Steering Wheel, PAC Aux Input, Ipad Mount, 5% Tint all around w/ 50% Windsheild Tint
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post #8 of 10 Old 11-16-2011, 03:31 PM Thread Starter
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Quote:
Originally Posted by Fred@PMM View Post
Do you do alot of towing with the truck? If so, I would recommend a muffler, it can get pretty obnoxious.....
I tow my boat to the boat launch every weekend during the summer but that's only at the other corner of my neighbor hood so I wouldn't say I tow a lot technically. I'm starting to lean towards just going with 4" it doesn't sound like there is much of a difference in noise and plus that money saved can go towards the gauges I need to get still

03 F350 6.0 SRW 4X4 lariat

481hp 832tq

8" super lift 385/70r16 Toyo MT's
FatBoy traction bars
Durastroke stg1
intake
MBRP 5" straight pipe
Custom tuned by Vivian "Looney Wild Track"
Edge Insight CTS
Zoodad mod
high idle mod
6.4 banjo bolts
Updated fuel pressure regulator (Blue spring mod)
EGR cooler delete
6K 55w HID's
6k 35w fog HID's
B&W turnover ball


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post #9 of 10 Old 11-16-2011, 05:03 PM
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Quote:
Originally Posted by psd_va View Post
I tow my boat to the boat launch every weekend during the summer but that's only at the other corner of my neighbor hood so I wouldn't say I tow a lot technically. I'm starting to lean towards just going with 4" it doesn't sound like there is much of a difference in noise and plus that money saved can go towards the gauges I need to get still
By all mean go muffler-less if that's all you tow, I used to pull a 32ft enclosed with mine and without a muffler it was obnoxious! Let us know if we can help you in anyway!

Performance Machine & MFG.
www.PerformanceMachineMFG.com
Manufacturers of High Quality EGR Delete Kits for 6.0L, 6.4L, & 6.7L Powerstroke Diesels
Toll-free: 877-408-3256
E-mail: orders@performancemachinemfg.com



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post #10 of 10 Old 11-17-2011, 02:48 AM Thread Starter
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Yea I straight piped the factory exhaust so I have an idea what to expect but its not loud enough and of course not free flowing enough either but I already planned no cat no muffler

03 F350 6.0 SRW 4X4 lariat

481hp 832tq

8" super lift 385/70r16 Toyo MT's
FatBoy traction bars
Durastroke stg1
intake
MBRP 5" straight pipe
Custom tuned by Vivian "Looney Wild Track"
Edge Insight CTS
Zoodad mod
high idle mod
6.4 banjo bolts
Updated fuel pressure regulator (Blue spring mod)
EGR cooler delete
6K 55w HID's
6k 35w fog HID's
B&W turnover ball


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