4" exhaust = hp & torque - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 06-09-2011, 07:48 PM Thread Starter
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4" exhaust = hp & torque

I have been told that going to a 4" exhaust system that it will increase the hp & torque. Any truth to this? And if so how much could you expect to see?
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post #2 of 11 Old 06-09-2011, 08:08 PM
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I bet it adds some, but not enough to really notice....but its gonna feel faster, cause it louder and sounds better.....but i would say no more then 10, maybe 15hp
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post #3 of 11 Old 06-10-2011, 04:22 AM
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I don't think it adds much noticeable power. It will feel faster though because it sounds pretty sweet.

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post #4 of 11 Old 06-10-2011, 04:27 AM
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Quote:
Originally Posted by jayhawk238 View Post
I have been told that going to a 4" exhaust system that it will increase the hp & torque. Any truth to this? And if so how much could you expect to see?
its not really gonna add that much hp, but if i were you then i would definately get it just for the fact that it will lower your egts.
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post #5 of 11 Old 06-10-2011, 04:33 AM
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When I did mine on my 07, I didn't notice any more power, but spool up was noticeably faster.

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post #6 of 11 Old 06-10-2011, 10:12 AM
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I've been told on a full size diesel truck, you need to add at least 50 hp to feel a noticeable difference. An exhaust certainly wouldn't give that kind of improvement, but it sure does sound good

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post #7 of 11 Old 06-10-2011, 10:25 AM
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I noticed a small seat of pants feel but prolly not much power increase



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post #8 of 11 Old 06-10-2011, 11:11 AM
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plus a straight pipe on a 6.0 is good for the pantidroppur mod.
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post #9 of 11 Old 06-10-2011, 01:15 PM
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What, are you guys kidding me? When I added my 4" straight pipe I picked up at least 100rwhp and 150rwtq. I wore the tires out the following week from all the extra power and had to replace them with bigger more aggressive rubber to hold all the extra power. That didn't help much so I had to put 2 mufflers in (I have duals) to bring the power back down and save my new tires.



Just kidding. A new 4" will lower your EGT's some and sound awesome if straight piped but you aren't going to see any noticeable performance gain from it.
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post #10 of 11 Old 06-10-2011, 01:18 PM
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LMAO! Mine sounds sweet, but it didn't add any HP... Now those Banks stickers on the other hand...

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