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which cat-back to get?

This is a discussion on which cat-back to get? within the External Engine forums, part of the LSx Technical Help Section category; hey, I have been looking into getting some cat-back exhaust. I was told SLP is very loud and annoying. I ...

  1. #1
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    98 Z28 M6

    which cat-back to get?

    hey, I have been looking into getting some cat-back exhaust. I was told SLP is very loud and annoying. I want something that is going to be pretty loud but no to the point where its annoying to drive. What about SLP LM II or Magnaflow? Any other brands i should check out. and does anyone have sound clips? I plan to do OFY and LTs in the feature.

  2. #2
    R.I.P. LS1 LS1Power06's Avatar
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    03 Terminator

    BORLA. it may be expensive but im a firm believer in you get what u pay for.

    hit up www.ls1sounds.com if u want to hear sound clips.

  3. #3
    Senior Member
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    pewter
    2001 z28 lingenfelter 383

    love my borla

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    Junior Member josh110781's Avatar
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    red
    2000 trans am WS6

    im extremely happy with my magna flow
    slp lid,maf and smooth bellow. ls6 intake, cnc ported and polished ls6 heads with competition valve job. cam 237,242 .603,.609 113 lsa. pacesetter longtube headers and off road y-pipe. magnaflow catback
    dyno numbers on a mustang dyno
    394 rwhp @ 6300 RPM
    345.7 rwtq @ 4800 RPM

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    member since may 2000 nhraformula's Avatar
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    black
    2000 nhra edition formula

    well with long tubes and off road pipe in the future, the hooker areochamber.
    it has a nice deep tone and no rasp.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

  6. #6
    Junior Member 99_LS1's Avatar
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    light pewter metallic
    '99 Camaro z-28

    I got a magnaflow a few months ago...after a really long time deciding which I wanted. I couldn't be happier. The car has a nice tone to it at low RPM's although quiet but really comes alive when you shoot the RPM's up. Either way it's not too loud but not stock-ishly quiet. That's all I have done to the car. It was a great buy for me since I couldn't spend too too much money and really disliked the LM.

  7. #7
    The Pulse of the Maggots SicWs6's Avatar
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    NBM
    1999 Trans Am WS6

    I love my SLP LoudMouth 1!!!! It is loud but thats what I like!! SLP all the way!!!

  8. #8
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    98 Z28 M6

    yes, I'm thinking magnaflow. There are some camaros and trans am with full slp and they are just too damn loud. thats why i didn't know about the slp II. thanks for all the help guys.

  9. #9
    Member 28Marcos's Avatar
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    Pewter
    99 Z/28

    Quote Originally Posted by LS1Power06 View Post
    BORLA. it may be expensive but im a firm believer in you get what u pay for.

    hit up www.ls1sounds.com if u want to hear sound clips.

    i also am a believer of the same philosophy, except i want that chambered exhaust by gmmg.

  10. #10
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    98 Z28 M6

    I have been looking around and cant find a site that sells gmmg. can someone post up a site so i can see this setup please.

  11. #11
    SSweet Home Chicago!!! BlankinSShip's Avatar
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    Light Pewter Metallic
    2001 Camaro SS

    Loud Mouth

    Get the SLP Loud Mouth 1. I drove around with it for years and it is great. I have the Loud Mouth 2 now, but it is not quite as earth shattering.

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  13. #13
    Senior Member ss~zoso~ss's Avatar
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    SS: NBM, tan top
    1998-SS, 2010 Jetta TDI

    i'll get flammed, but i have a 40 series flowmaster, and i love the sound

    most of the crap you hear about flowmaster is about the 80 series

    you also dont need to buy a catback, u can just get the muffler, i believe the intermediate pipe on SS's and WS6's is stainless and 3 in anyways, no use getting rid of it

  14. #14
    Pathelogical Liar BlackLT1Z28's Avatar
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    94 Camaro Z28

    I vote for the loudmouth. One of the cheapest stainless steel systems you can get. Great quality too.

  15. #15
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    98 Z28 M6

    I think the SLP with LTs and OFY is just to loud and with it being my DD it would just get annoying. I can't really tell how the SLP II compairs to the magnaflow. any comments on that? How much does the GMMG cost?

  16. #16
    Junior Member 99_LS1's Avatar
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    light pewter metallic
    '99 Camaro z-28

    The GMMG was pretty expensive when I last looked (don't remember how much though, sorry) which was the only reason I didn't go with that one, it really does sound great and would be my top choice. Did you try LS1sounds.com at all? Not sure if someone mentioned this already but it helped me out a bit when I was looking since on some videos people's exhausts aren't always true to sound for some reason, I'm not tech person though. If you have the money definitely go with the GMMG, if not the magnaflow is a great pick too.

  17. #17
    Pathelogical Liar BlackLT1Z28's Avatar
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    Black
    94 Camaro Z28

    GMMG is like $800, so its up there with the borla and corsa systems. Magnaflow and loudmouth are the only systems that I can think of that are under $500 and are stainless steel, like the more expensive systems.

  18. #18
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    98 Z28 M6

    Quote Originally Posted by 99_LS1 View Post
    The GMMG was pretty expensive when I last looked (don't remember how much though, sorry) which was the only reason I didn't go with that one, it really does sound great and would be my top choice. Did you try LS1sounds.com at all? Not sure if someone mentioned this already but it helped me out a bit when I was looking since on some videos people's exhausts aren't always true to sound for some reason, I'm not tech person though. If you have the money definitely go with the GMMG, if not the magnaflow is a great pick too.
    yes someone did say to check out ls1sounds.com and i have but the only thing is because of sound quality and a bad sound card, i cant tell if the SLP II or the magnaflows is louder. Anyone know for sure which is louder at idle and full throtle?

  19. #19
    Formulatastic yellowv's Avatar
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    98 Formula /93 Z28

    Quote Originally Posted by biga0206 View Post
    yes someone did say to check out ls1sounds.com and i have but the only thing is because of sound quality and a bad sound card, i cant tell if the SLP II or the magnaflows is louder. Anyone know for sure which is louder at idle and full throtle?

    I am not sure as I haven't compared them but I would bet the LM2 is louder. It uses a small stright through bullet muffler while the Magnaflow uses a larger crossflow.

  20. #20
    Member edbird's Avatar
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    1999 trans am convert

    Love my Hooker,sounds great and is inexpensive!

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