View Poll Results: How many of you have True Dual exhaust?

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  • hell yes!

    73 39.89%
  • nope

    110 60.11%
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  1. #1
    Senior Member GottaHaveLS1's Avatar
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    How many of you guys have True Dual Exhaust?

    How many of you have True Dual exhaust on ur f body? If you do, what is your setup and how much did it cost you?
    1999 Trans Am M6
    SLP Short Throw, Lid and CAI, Strano Springs, Koni Sport Shocks, BMR STB and SFC, UMI PHB, Pacesetter LT's and ORY, Magnaflow Catback, DMH 3" E-Cutout, LS7 Clutch, Motive 4.10, 160 T-Stat, MSD wires,, 17x9.5 Chrome C6's wrapped in Hankook 275/40/17

    Tuned at Mongillo Motors in New Haven, CT - 303 RWHP and 308 RWTQ

  2. #2
    Senior Member Wheeler99WS6's Avatar
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    black, 05 Roush
    black, 99 T/A WS.6

    TSP Tru-duals w/sweet thunder mufflers, I am thinking it was around $400 shipped. check www.texas-speed.com
    1999 T/A WS6 Black -------SOLD
    05 mustang Roush sport;
    DOB manifold, m122 SC, 47lb injectors, gt500 TB, roush TVS CAI, Detroit rocker SC grind camshafts, Mac LTs, off road x, roush off road mufflers, roush short throw shifter, kenne bell BAP, Brenspeed 93 octane tune. 479rwhp 436ftlbs SAE.

  3. #3
    Senior Member GottaHaveLS1's Avatar
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    Quote Originally Posted by Wheeler99WS6 View Post
    TSP Tru-duals w/sweet thunder mufflers, I am thinking it was around $400 shipped. check www.texas-speed.com
    Do you happen to have any pics of ur car from behind? I'm curious to see what a TA looks like without the tips coming out of the bumper.

  4. #4
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    I got true duals through an X, over the axle into two 14" bullets staight out the back.

  5. #5
    Member Fran D's Avatar
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    Quote Originally Posted by 9t8z28 View Post
    I got true duals through an X, over the axle into two 14" bullets staight out the back.
    I see that this is your line of business. Did you do it yourself? If so, how much would you charge a fellow LS1 owner for the same?

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

    sorry no pix of mine, but it has dumps before the axle. you can see vids on www.ls1sounds.com there are a couple guys that have the same kind of exhaust as mine on there with vid shots of rear and all.

  7. #7
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Quote Originally Posted by Fran D View Post
    I see that this is your line of business. Did you do it yourself? If so, how much would you charge a fellow LS1 owner for the same?
    $300 + $75 for labor

  8. #8
    Member Fran D's Avatar
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    Quote Originally Posted by 9t8z28 View Post
    $300 + $75 for labor
    Hmmm...not bad. Any pics of your efforts?

  9. #9
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Quote Originally Posted by Fran D View Post
    Hmmm...not bad. Any pics of your efforts?
    I do but it is curantly designed for a dual cat LT1 car. I am having trouble with my digital camera(P.O.S.) In 2 weeks I am putting it on my 98 because from the transmission forward it is different but easier to design.
    From the transmission back it is the exact same.
    It also all depends on what you want. Some guys want the system to be 3" off of the collecter into a 3" X-pipe and then 2.5" out the back. You could also include high flow cats which would cost a little more.
    My dual system on my car will be 3" off long tubes into 3" cats then into a 2.5" X-pipe staight out the back. Testing we have done shows that the 3" x flows a small amount better compared to a 2.5" x both into 2.5" talls. The small gain is not worth it considering you will loose ground clearance.

  10. #10
    Member Fran D's Avatar
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    Thanks for the info. I'm not ready to pull the trigger now, but I've added you to my list and will contact you when the appropriate time (and cash ) arrive.

  11. #11
    Senior Member Hurley711's Avatar
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    414 RWHP 395 RWTQ
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    Quote Originally Posted by 9t8z28 View Post
    I do but it is curantly designed for a dual cat LT1 car. I am having trouble with my digital camera(P.O.S.) In 2 weeks I am putting it on my 98 because from the transmission forward it is different but easier to design.
    From the transmission back it is the exact same.
    It also all depends on what you want. Some guys want the system to be 3" off of the collecter into a 3" X-pipe and then 2.5" out the back. You could also include high flow cats which would cost a little more.
    My dual system on my car will be 3" off long tubes into 3" cats then into a 2.5" X-pipe staight out the back. Testing we have done shows that the 3" x flows a small amount better compared to a 2.5" x both into 2.5" talls. The small gain is not worth it considering you will loose ground clearance.


    How bout dyno results? Are there any proven gains with your setup? I know some of the true dual systems tend to gain under the curve, curious to see what results you have had. Thanks

  12. #12
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    3 more horsepower using the 3" X. I don't have the sheets myself ( my boss has them) but to me it isn't worth ground clearance plus its less complicated to build. And the amount of 3" pipe that you use significantly increases the weight of the system and a true dual on an F-Body already weights alot.

  13. #13
    Senior Member Hurley711's Avatar
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    Quote Originally Posted by 9t8z28 View Post
    3 more horsepower using the 3" X. I don't have the sheets myself ( my boss has them) but to me it isn't worth ground clearance plus its less complicated to build. And the amount of 3" pipe that you use significantly increases the weight of the system and a true dual on an F-Body already weights alot.
    Cool.....but I actually meany between a catback and true duals..what r the gains?

  14. #14
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    I asked this in the sticky about TD a couple days ago.
    How would side exit before the rear wheels look/perform if done with TD? That why they would no ground clearence issuses tring to go under the axle, atleast I don't think anyway.

  15. #15
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Quote Originally Posted by Hurley711 View Post
    Cool.....but I actually meany between a catback and true duals..what r the gains?
    I am trying to find the post on Z28.com but I am insuccesful. There was a guy who went from a Loudmouth to true dual over the axle w/X and gained 3tenths of a second in the quarter. I didn't do a dyno test of a catback compared to true duals, but using an X-pipe( which you can only use with duals) will make sometimes at the least 10 more horsepower.

  16. #16
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Quote Originally Posted by HurricaneLS1 View Post
    I asked this in the sticky about TD a couple days ago.
    How would side exit before the rear wheels look/perform if done with TD? That why they would no ground clearence issuses tring to go under the axle, atleast I don't think anyway.
    You will loose ground clearance with side exit. I think it is rediculous to go under the axle.

  17. #17
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    Quote Originally Posted by 9t8z28 View Post
    You will loose ground clearance with side exit. I think it is rediculous to go under the axle.
    Well yeah, I guess you still would lose clearance. O-well, I'm use to having little ground clearance between my old SC300 and my RX-7.

    How about performence gains, it would be the same as dumped,huh?

  18. #18
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Yes, it should be the same.

  19. #19
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    This is not the finished product.



  20. #20
    Senior Member Hurley711's Avatar
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    414 RWHP 395 RWTQ
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    $375 installed for everything?

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