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best catback for gto...

This is a discussion on best catback for gto... within the GTO forums, part of the Vehicle Specific category; I currently have the GTO in my sig. I have cutouts on it now but cant stand the interior noise ...

  1. #1
    HUNTER S. THOMPSON FAN Raoul-Duke's Avatar
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    best catback for gto...

    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...
    01 m6 z28 - lid / lt headers / 3' ory w no cats / flowmaster catback w 3' dmh e-cutout / nelson pcm tune

  2. #2
    Grand Imperial Wizard Sarge's Avatar
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    Retired Outlaw Sum Bitch

    Cut Outs kill torque.......sounds to me like your looking for these...
    http://www.neweraperformanceparts.co...=E&PKV=31060|0
    Last edited by Sarge; 01-26-2008 at 04:01 AM.

  3. #3
    HUNTER S. THOMPSON FAN Raoul-Duke's Avatar
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    Quote Originally Posted by Sarge View Post
    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...

  4. #4
    Grand Imperial Wizard Sarge's Avatar
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    Retired Outlaw Sum Bitch

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

    This is my signature. It is mine. Nobody else has one like it.

  5. #5
    Junior Member
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    silver
    1998 bmw z3

    Quote Originally Posted by Raoul-Duke View Post
    No flowmaster of course.
    Just curious why no flowmaster of course?

  6. #6
    Junior Member dkrowner's Avatar
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    cyclone grey
    2006 pontiac gto

    they're junk is why
    2006 gto cyclone grey ls2 m6
    aps tt system,90mm ported fast intake,elite catch can,b&m short shifter,fiske profil 10 18x8 1/2 245/40/18ZR 38mm offset fr 18x9 1/2rr 275/40/18ZR 51mm offset rr,Magnaflow cat
    back.
    2006 GSXR1000 with to much done to it then i'm willing to write about.

  7. #7
    HUNTER S. THOMPSON FAN Raoul-Duke's Avatar
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    Quote Originally Posted by Sarge View Post
    No nothing lost up top.......I run the loudmouths in a "custom" exhaust....
    Click for full size
    Click for full size
    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
    Quote Originally Posted by dkrowner View Post
    they're junk is why
    correctamundo

  8. #8
    Nitrous Tuner LS2Tuner's Avatar
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    Quote Originally Posted by Blownone94 View Post
    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
    Don't be afraid of the bottle!!! Be afraid of your tune!!!

  9. #9
    Junior Member dkrowner's Avatar
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    cyclone grey
    2006 pontiac gto

    Smile

    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.

  10. #10
    Nitrous Tuner LS2Tuner's Avatar
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    Quote Originally Posted by dkrowner View Post
    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!

  11. #11
    Junior Member dkrowner's Avatar
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    cyclone grey
    2006 pontiac gto

    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

  12. #12
    Nitrous Tuner LS2Tuner's Avatar
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    Quote Originally Posted by dkrowner View Post
    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.

  13. #13
    footbrake racer racer426's Avatar
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    silver
    2004 gto

    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

  14. #14
    Junior Member dkrowner's Avatar
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    cyclone grey
    2006 pontiac gto

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

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