has anyone compared a cutout on stock exhaust to any aftermarket cat backs? I've been debating on whether to get a cat back or not and would like to see the results. i doubt ill be making any serious power anytime soon.

 

i would just put a cut out on the stock exhaust.

 

i've already got the cutout lol what i've been debating on is should i get a cat back or just get my buddy to weld up these vette tips and leave the stock exhaust with the cut out.

 

i'd redo the whole exhaust. get some LT headers and start from there

 

i want to redo it all later when i got money lol. i just want to know what kind of power differences there are between cut outs and cat backs, if any.

 

Cut outs should flow the best, i mean there have been comparisons on dyno's with cutouts open or closed, some catbacks are better then others, but if its for power reasons and not sound reasons your cutout should out perform all catback considering it like like open pipes!

I have a Magnaflow catback and i love it! I have read a cutout would net me around 3rwhp over this catback because it flows so good. but who knows if that is true. But sure sounds good.

 

thats basically all i wanted to know i figured something like an slp being 3"piping and a straight through muffler might get me more power than a stock cat back with cut out.

 

damn I want a magnaflow man

 

with an open cutout your going to get more power then with any cat-back cause your letting the exhaust out before it even goes through the cat-back can't get any better flowing then that

 

so in actuallity i'd be better off to do headers and y-pipe with stock cat back and cut out over header back full exhaust. i don't think i'm gonna bother with a cat back than until i HAVE to. thanks for the info all of ya's.

 

I am going back to a stock cat-back and doing a cut-out.... I like the car being quit when I want it to, then being free flowing when it needs to be.

 

i just leave it open, personally its not loud enough for me lol.

 

Your car will not get louder with a cat back. If you want the car to be louder get long tubes and a catless Y pipe.


Here is what my H/C car made with the cut out open and closed. I have the stock muffler on my car.

 

Ya SLP Loudmouth is a Catback and on a stock car it will make it louder...? My Magnaflow is a lil louder then stock at idle, once im driving its a louder but not too loud.

 

Cutout is cheaper and more power! Dyno proven! Which will go perfect for your budget.

 

My 94 Z28 had a mild heads & cam setup and a Flowmaster 3" Catback with two resonators, it picked up 19 rwhp with the cutout open and always picked up 1.5+ mph in the 1/8.

 

stock catback with a cutout here...i wanted max effort at the track on quiet on the street...

well quiet until i open up the butterfly and see the shock on peoples faces...lol

 

Maybe I'm just crazy but my car sure seemed louder with a loudmouth on and everything else being stock.

 

So you gained 53hp and 40tq open v. closed? That is insane.

 

yeah thats just nuts!! I dont have a cut out but a dyno mouth with hooker lt headers..Makes me wonder how much of a gain would be if I added dual cut outs to my H/C/I car