best catback for gto...

[Raoul-Duke]

I currently have the GTO in my sig. I have cutouts on it now but cant stand the interior noise and vibration anymore...Im lookin to buy the loudest and best flowing catback for the money. No flowmaster of course, and headers are not a future mod because i am finishing up my degree this fall so cash is short..i was leaning towards slp's loudmouths. I dunno which is better, one or two?..and although i used to have a borla on my z and loved it. i dont have money for it....Also will i lose hp switching from my cutouts to a catback? my cutouts i know flow better up top and sit right under my driver seat (noise sucks)...But i plan on cutting out the cats and welding the catback a lil further up because my cutouts are welded to them so maybe a lil bit of flow may increase...

[Sarge]

Cut Outs kill torque.......sounds to me like your looking for these...
http://www.neweraperformanceparts.co...=E&PKV=31060|0

[Raoul-Duke]

Cut Outs kill torque.......sounds to me like your looking for these...
http://www.neweraperformanceparts.co...=E&PKV=31060|0

wow. great price! thanks man..yeah thats the first loudmouth huh? hey sarge, so up top i wont lose that much?? also im gonna post some pics from under my car of how they welded the cutouts because the way they did it (piss poor). They actually cut out the piece of pipe where it bolts my catback to the actual x pipe..i could prob just take it to a shop and they could weld a pipe to it most likely but im just a lil pessimistic about it..need another opinion...

[Sarge]

No nothing lost up top.......I run the loudmouths in a "custom" exhaust....

[Blownone94]

No flowmaster of course.

Just curious why no flowmaster of course?

[dkrowner]

they're junk is why

[Raoul-Duke]

No nothing lost up top.......I run the loudmouths in a "custom" exhaust....

no shit? very nice sarge..yeah i was just asking cause i didnt really wanna see my 1/4 mile times get worse from a catback,lol

they're junk is why

correctamundo

[LS2Tuner]

Just curious why no flowmaster of course?

They just are NOT the best flowing muffler. Not to mention most like the Flowmasters due to the 5.0 Mustang era that made those mufflers what they are today will NEVER sound anything like that on any Goat.
I have found that any type of chambered muffler like that sounds a lot better with a H-pipe system. Where as X-type system sounds better with a blow through like the Dynomax Bullets.

I like the SpinTech Prostreets and also the new DNA's Street mufflers sound really good to me.


Personally I can't stand cutouts due to the resonating that reminds me of glasspacks. Not to mention it would need to be tuned with them open to see any real gain other than noise. Which will also mean a loss in power when the mufflers are hooked up.

http://www.tunedproducts.com/DNA/street.html
http://www.spintechmufflers.com/spin...ntechindex.asp

[dkrowner]

i've put magnaflows on every car i've owned even afew caddys,a 89 325ix and 94 325i bmw's,and a 1973 jag.so you could say i'm stuck on them suckers like a bad habit.

[LS2Tuner]

i've put magnaflows on every car i've owned even afew caddys,a 89 325ix and 94 325i bmw's,and a 1973 jag.so you could say i'm stuck on them suckers like a bad habit.

Too much popping for me on those Magnaflows especially if it's 3" and has a X pipe!

[dkrowner]

on my 06 gto there only 2 1/2 inches,but they sound good on my car.not to loud off the bat but start screaming when the rpm's are going.in no popping sofar

[LS2Tuner]

on my 06 gto there only 2 1/2 inches,but they sound good on my car.not to loud off the bat but start screaming when the rpm's are going.in no popping sofar

Do you still have the factory "pre muffler" on it? If so it will help eliminate that resonating.

[racer426]

had the slp kit on my gto. sounded like a stang and would run you out of car with reso. put on a 80 series flow and made the whole kit myself .went from 8.70 to 8.487. true duels no reso's,x pipe

[dkrowner]

no just the pipes off of the aps tt turbo's