Cut out ?

[96Camaro]

What kind of power gains are expected when putting on exhaust cut outs? Or is it just kinda for sound? Curious because I'm considering putting them on. And where do you guys mount them.

[EquatorHeat00]

My car feels like a dog with the cutout open, and kills my low end torque dramatically. Just noise to me don't care for it. (Worst mod I got.) I hate the clearance that I lose underneath the car. Does the Hypertech power tuning have any effect on performance loss from a cutout open?

[1sickbird]

according to qtp on ls1 will gain 13hp and you can put one on I pipe.more info about cutout you can find it on www.quicktimeperformance.com
i hope that will help.

[PUREPWR]

My cut out is located right before muffler, i hate it so much, the low end torque is definatly not all there compared to when the cut out is closed, and it rattles everything. The whole center console just sounds like it is going to rattle apart. I will never get one again.

[Red20170]

Great for when top end is important. Like highway runs ,the track,etc.. Also the underground parking (car alarms) . Not good for everyday around town driving.

[LS1 TA]

My friend john and I both have them on our cars. John has a 1995 z28 6 speed, with heads, cam, headers, roller rockers, reprogrammed computer, plus all of the free LT1 mods. At the track in Roswell (3700ft above sea level) There is about .5-.7 of a second difference between capped and un capped headers. Uncapped being faster.

[fastTa]

IMHO cut outs sound like crap. No offense to anyone here who has them. If you want more power or a better sounding exhaust, then mod your car properly. Don't look for shortcuts. Do it right.

[Injuneer]

Is it possible the perceived "loss of low end torque" is simply the result of hearing a lot of noise and not having the car go anywhere, at least not in proportion to the noise? Without the cutout, the entire perception is different.... no noise but lots of response.

I agree with Kevin.... a cutout sounds crude. Just adding the Borla XR1 shorties to my exhaust took the raw edge off it, and I can't find any power loss from them. Still too loud, but then its not a street car anymore (unfortunately, lately its more of a "garage car").

[Kevin - Blown 95 TA]

I have an electrical cutout at the back flange of the Borla where the plates with the holes normally go, and it is a great mod - kinda like the exhaust was made for it. It sounds great, but I normally keep it closed to make the car quieter, even though it's still too loud. I use it at the track almost exclusively, which isn't very often (but maybe in a couple weeks )

Anyway, I wouldn't even consider having cutouts at the head pipes or before the cat on a street car - I have heard these and they're horrendous. you would be sitting right over it and it would probably rattle you silly.

[Injuneer]

Another thing to keep in mind is what yuor local track requires in the way of noise reduction. Our local track (Englishtown NJ) requires mufflers and pipes that end at least past the rear edge of the door. They've even increased the requirement to "no collector mufflers, must be two chamber", so I don't even know if my Borlas will pass.

A couple years ago, SLP rented the track for their "Customer Appreciation Day", and the SLP LS1 demo car was banned from the track when they uncorked the cutouts.