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Sweet Thunder or Moroso Spiral Flows?

This is a discussion on Sweet Thunder or Moroso Spiral Flows? within the External Engine forums, part of the LSx Technical Help Section category; Just wanted to get some opinions on what others thought about these two true dual mufflers. Getting ready to order ...

  1. #1
    Mattg
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    Sweet Thunder or Moroso Spiral Flows?

    Just wanted to get some opinions on what others thought about these two true dual mufflers. Getting ready to order some pacesetters and an x pipe. I can't decide on which muffler to go with. I've looked on LS1 sounds and I think I like sweet thunders sound. My car is an automatic by the way. Cam soon to come this summer. Thanks for any input!

  2. #2
    Member Speed Psychosis's Avatar
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    Red
    98 T/A M6 w/lid and LM1

    I haven't heard much about spiral flows but i have heard only good about sweet thunders. here's a couple vids.

    startup/rev
    http://video.google.com/videoplay?do...arch&plindex=0

    passing, burn outs, and in car
    http://video.google.com/videoplay?do...arch&plindex=0


    I'm going with them in the texas speed exhaust when I get my car.

  3. #3
    Senior Member Wheeler99WS6's Avatar
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    black, 05 Roush
    black, 99 T/A WS.6

    I have the TSP true duals with Sweet thunder mufflers. Gotta say I love em. I havent personally heard the Moroso spiral flows either.

  4. #4
    Member WS6ICK2K's Avatar
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    Metallic Blue
    2000 Trans Am WS6

    Do most people run the x with dumps or over the axels?

  5. #5
    Member Speed Psychosis's Avatar
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    Red
    98 T/A M6 w/lid and LM1

    TSP is under. if lowering, over might be best. Its going to be louder for you if dumped. Also, imo a T/A needs it to come out the back since the bumper was designed for dual outlets.

  6. #6
    Senior Member Wheeler99WS6's Avatar
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    black, 05 Roush
    black, 99 T/A WS.6

    Mine are TSP true duals dumped.

  7. #7
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    Black
    2000 Camaro SS

    I would go over the axle with the dual pipes and out the back from under the bumper. Mufflers? I suggest straight through, MagnaFlows. They hold the noise down but flow like straight pipes.

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