DIY 6637 & muffler deleat = how much hp gain

[ericvfa106]

i have a 2000 f250 7.3 i installed a DIY napa 6637 filter and deleated the muffler and ran a stright pipe how much hp. and tq. do you think i gained.

[scheidt27]

So little than you wont even notice it. They are not really HP/TQ gain mods, but more supporting mods IMO

[layson]

Yep... you won't see much gains at all... it is just a supporting mod... Sounds much better though!!

[kwerges]

Did the 6637, but wondering how much louder the muffler delete is? Don't mind it sounding better, but don't want it much, if any, louder. Please advise...

['01SilverBullet]

No real power gains. Might gain a hair on mileage though, as the engine is breathing a bit easier...well once you get over how sweet that straight pipe sound!

[AgTires4295]

Originally Posted by kwerges

Did the 6637, but wondering how much louder the muffler delete is? Don't mind it sounding better, but don't want it much, if any, louder. Please advise...

The muffler delete is not much louder unless you start laying the pedal to the floor. Then it gets that deep raspy sound. I thoroughly enjoy the occasional romp on the accelerator. All in all though, not much louder

[dieselcrawler]

I agree, not too much louder..

[85_305]

What I dont understand is how people think that an exhaust gives mpg, but no hp. If you have one, you must have the other.

With that being said, I cant say you got "x" hp or "xx" hp from intake/turbo back... but I can say that you are certainly gaining hp/tq if you can A.) feel the difference, and B.) Are picking up mpg.

[drunk on diesel]

allowing the engine to breathe allows the turbo to spool up easier and get the engine into its efficiency range sooner... that doesn't necessarily equate to an increase in power

[85_305]

Efficiency is energy. Proper allocation of energy results in greater outcomes (egt, hp/tq, mpg).