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True Dual Exhaust

This is a discussion on True Dual Exhaust within the External Engine forums, part of the LSx Technical Help Section category; I really want to have true dual exhaust on my TA but i have only found a couple companies that ...

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    Rice Hungry GottaHaveLS1's Avatar
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    True Dual Exhaust

    I really want to have true dual exhaust on my TA but i have only found a couple companies that have aftermarket products. One is Bassani and i think i've heard of a couple more. It seems much more expensive than a y pipe and cat back. Is true dual much better? Is it worth the cost? Anyone know any other True Dual systems?

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    member since may 2000 nhraformula's Avatar
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    to me its not worth the extra cost.
    while a true dual will give you better under the curve power, the price difference is a deal killer for me.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

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    Awaiting Activation NeeD4SpeeD's Avatar
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    Texas-speed and performance makes a 3" true dual system called the TSP Rumbler True X system... And that is what i have. It is pricy but only cost me $800 total:

    $400 (free shipping they were running a special) TSP Rumbler True X
    $380 + 20 shipping Pacesetter LT headers

    And i did the installs myself. What i think is the killer in this matter is the cost of installation. Granted a y-pipe might be cheaper but if you plan on running high HP your going to want to look for the TD setup.

    And yes HP is different B/T the 2 but not a tremendous amount. Remember with more HP you'll need an exhaust that can handle it. I have the TD and personally i love em and would never think anything else!!!

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    Rice Hungry GottaHaveLS1's Avatar
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    That sounds like an excellent deal actually! I was looking at pacesetters myself.

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    Rice Hungry GottaHaveLS1's Avatar
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    Hmmm, i just noticed that the TD system is dumped. Wont that cause much more noise in the cabin? I'm thinking of getting rid of the cats and i dont want my car to be too too obnoxious inside the car or outside. Do you know if it would be easy to modify the TD system so it reaches the end of the car and has tips on it? I know several people that can weld for me.

  6. #6
    Snake Eater
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    Quote Originally Posted by GottaHaveLS1
    Hmmm, i just noticed that the TD system is dumped. Wont that cause much more noise in the cabin? I'm thinking of getting rid of the cats and i dont want my car to be too too obnoxious inside the car or outside. Do you know if it would be easy to modify the TD system so it reaches the end of the car and has tips on it? I know several people that can weld for me.
    Yes it would be easy... and I don't think the TSP TD's are dumped.

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    Senior Member MadSeason's Avatar
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    They're dumped and it is noisy as hell that way. and sure it's easy to put tips to the back if you want to go under the axle like a red neck

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    Quote Originally Posted by Snake Eater
    Yes it would be easy... and I don't think the TSP TD's are dumped.
    TSP system is dumped man... I actually modifyed it and torched the dumps off cuz i dont like dumps and i want pipes out my rear...

    So i got rid of em, welded up 2 3" pipes, had them run under the axel (no clearence loss) and out the back!!

    So if you dont want the dumps you dont need to have em cuz i dont!!! hehe:beer3:

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    Senior Member Zboner's Avatar
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    there is a LS1 shop by me that makes true dual systems that extend all the way out over the rear axel for about 1,200 i believe but its worth it.

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    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by Zboner
    there is a LS1 shop by me that makes true dual systems that extend all the way out over the rear axel for about 1,200 i believe but its worth it.
    1200 for an exhaust and worth it??
    the duals will make a few more h.p over a $300 hooker exhaust.

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    Senior Member Zboner's Avatar
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    lets see headers, fabing everything, mufflers, tips, pipe,

    seems about right

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    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by Zboner
    lets see headers, fabing everything, mufflers, tips, pipe,

    seems about right
    i didnt see headers were included, my fault

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    Senior Member Zboner's Avatar
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    no i didnt put them on there sorry about that my bad.

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    Rice Hungry GottaHaveLS1's Avatar
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    Newb question: Do most aftermarket catback system go over or under the axle?

    Was it difficult to modify the TSP system to reach the rear of the car? I know several people who can weld, if i need it done.

    Anyone else know any other true dual systems?

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    We're better this year GatorSS's Avatar
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    Most aftermarket catback systems go over the axle.

    Sure wish there were more true dual systems kits out there.

  16. #16
    Eric @ DMS
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    We just finished our custom true dual w/ H-pipe. It's installed on one of our project SS's. The fitmet is awesome and sound is incredible. This is with Kooks LT's and our lowering springs (among many other mods)...


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    We're better this year GatorSS's Avatar
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    Nice job...I just don't like the dumps under the car--way too loud inside for me.

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    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by GatorSS
    Nice job...I just don't like the dumps under the car--way too loud inside for me.
    fumes also

  19. #19
    Eric @ DMS
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    We're also working on one for over the axle setups...although as you know, not nearly quite as cheap to even fabricate a prototype.

  20. #20
    LS1 is the only one...
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    What about headers? I plan on putting some Eibach Sport springs on my car which will lower it about 2 inches. What headers fit well under the car and won't stick out. I plan on doing a 2.5 inch system for noise level, and ground clearences issues since I have to take this car over speed bumps everyday. So which headers fit the best under the car...Also, where are some good exhaust shops in N.C that have a mandrel bender??

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