I did a search and couldnt find an answer.
Just curious how much HP difference there is when using exhaust cutouts. Currently have a 2 1/2 inch using Flowmasters. HP rating now is around 500
If I add electric cutouts and open them up, any idea how much performaance there would be in either acceleration or HP ? I would be using them on the street and occasionally open them up.

do they cut out in front of or behind mufflers? if in front i would guess 25 hp with out all that back pressure, behind id say more like 10 or so hpcause ur still backing up in mufflers thats just my guess??
:eek:

I honestly have no clue on the performance gains, but I will tell you this... It will sound like DOG CRAP... I have a couple friends that have cutouts, and they sound HORRIBLE!!! I will NEVER get cutouts on anything. There IS a sound difference in the ones that are off the exhaust, and ones that are directly out of the headers though (like the electric cutouts). They sound better directly off the header. Why the double post?

Originally posted by RacnJsn95:
I honestly have no clue on the performance gains, but I will tell you this... It will sound like DOG CRAP... I have a couple friends that have cutouts, and they sound HORRIBLE!!! I will NEVER get cutouts on anything. There IS a sound difference in the ones that are off the exhaust, and ones that are directly out of the headers though (like the electric cutouts). They sound better directly off the header. Why the double post? You can't be serious!! Open exhaust on a built up motor is one of the best sounds in the world!

I happen to love the sound of my 350 breathing out the open cutouts right after the header. It makes a some difference at the track as well. Drop a tenth or two. Real Loud and throaty.

I was going to put some exhaust dumps in also. (right behind the header) However I decided instead to go with an exhaust that I can quickly drop and reattach if I wanted.

headers > 2 1/2" >mufflers > 2 1/2" > turndown. All ending before the rear axle. I figure this is a good way to do it because you have less exhaust in the first place, and all you have to do is undo one hanger and a few bolts from the header to run open headers. Throw in some copper or aluminum header gaskets if you don't want to buy new ones all the time. Just my .02 .....never said I was smart though. :D

Originally posted by Got_CID?:
You can't be serious!! Open exhaust on a built up motor is one of the best sounds in the world! No there is a HUGE difference between cutouts, and open exhaust... Open sounds great graemlins/thumbsup.gif No problem there... It the open cutouts that sound like crap...