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True Duals Over The Axle All the way to the back.

Old 09-28-2010, 09:19 AM
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Post True Duals Over The Axle All the way to the back.

I know theres alot of information out there about true duals and TPS's True Dual system. But the problem is i dont want DUMPS.

Right now im running Pace Headers with a ORY Welded to the stock Catback and a cut out right before the axle.

When i did this installation i did the welding my self BAD MISTAKE
I should of left this to some profesionals and not some stupid kid like me.
So everything is pretty much welded all the way to the cat back >.>
I personally think its a shitty system. And a very unexperienced install.

I'm planning on dummping this whole system and going with new headers
and a True dual system all the way to the back and OVER the AXLE
Option 1
All the installations ive seen that are true dual over the axle have been custom made. (how much would this run me?)
Or is there a company out there that makes a kit like this now?
Can it be a 3inch system all the way?
another note is i would like to also add two cut outs right after or made 1 foot after the headers to when i want to drive around pretty loud.
option 2
Would it be bettter to get 1 7/8 headers with two cut outs and a ORY and a New cat back?

Or would the dual cut outs be pointless with a new catback since there really good at free flow?

And Ofcorse im running a 1 3/4 system right now thinking of upgrading to a 1 7/8 header .... what headers would be good to work with ?

I was thinking of getting TSP's true dual package (headers and true duals) and mod it to go over the axle.
I know bmr offers a relocation lower control arm so make some more clearance over the axle.

I'm also doing a BMR ride height drop this weekend and ive herd that true duals and droped cars dont work so well...
So can i get some advice? on what i should do?


Any advice would be great.
Thanks,
Ws6Kid

Last edited by Ws6kid.; 09-28-2010 at 09:28 AM.
Old 09-28-2010, 09:51 AM
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ARH 1 7/8ths headers with Bassani True Dual setup. And a pair of cutouts if your made of money.
Old 09-28-2010, 09:55 AM
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Originally Posted by squee
ARH 1 7/8ths headers with Bassani True Dual setup. And a pair of cutouts if your made of money.
money isnt much of a problem to me ill save up
I just want a great and good performing system.
thanks for the info didnt know about this brand.
thank you.
Old 09-28-2010, 09:58 AM
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Originally Posted by squee
ARH 1 7/8ths headers with Bassani True Dual setup. And a pair of cutouts if your made of money.
Question where does the Bassani kit start? bc im looking at the ARH headers and the picture they show merge into a y pipe?
does the bassani kit start at the x molding?
Old 09-28-2010, 10:39 AM
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I honestly have no clue what your talking about when you refer to a x molding, but the Bassani kit its designed to bolt up to stock manifolds. Just a little modification and it'll mate up to the longtubes. Just a little trimming really...And I don't know why your talking about a y pipe either...you buy the headers...NO Y, and the Bassani kit. Its simple as that.
Old 09-28-2010, 10:41 AM
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Originally Posted by squee
I honestly have no clue what your talking about when you refer to a x molding, but the Bassani kit its designed to bolt up to stock manifolds. Just a little modification and it'll mate up to the longtubes. Just a little trimming really...And I don't know why your talking about a y pipe either...you buy the headers...NO Y, and the Bassani kit. Its simple as that.
That answered my questions.
thanks
and sorry for not being to clear....
still pretty early for me.
Old 10-07-2010, 02:54 PM
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Would the 2.5 be good to make some extra hp?
and another note if im running LT's would it be ok if it goes from a 3. outlet to a 2.5?
Any one else have pictures of there true dual set up anyone?
Old 10-07-2010, 03:18 PM
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I'd leave the headers alone (going to 1 7/8" isn't worth the price of new headers and install time if you're not replacing old rusty headers) and find a shop to do a custom setup. Texas is the world capital of f-bodies, so there's sure to be some shops around that could fab up a well-tucked, clean set of duals out the rear. You'll still have to be careful with speed bumps and things like that, but a custom setup by a good shop is going to tuck better than any out-of-the-box duals you'll buy.

You can run cutouts, but if you're going with bullet-style mufflers, the duals themselves are going to be pretty loud, even going over the axle. Save a little money and have the duals fabbed first, drive around with it like that for a week or two, and then if you decide you need cutouts, have them put in.

2.5" pipes would work, but 3" gives you more headroom for the future, if you decide to pick up a cam or heads.
Old 10-07-2010, 03:18 PM
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yeah it's ok to neck down from 3 to 2.5 inches. 2.5 inches is good up until 500hp, so I've read. Although if I extend out the back I'd certainly like to keep it 3 inch the whole way, but I'm not sure if you can get a pair of 3 inch pipes over the axle, even with a relocated LCA since basically everybody with true duals over the axle runs 2.5". And I would be quite worried about true duals on a lowered car. My exhaust only scrapes every now and then, but if I were lowered it would probably scrape quite a bit.
Old 10-07-2010, 09:18 PM
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Thanks for the tips guys.
Old 10-07-2010, 10:30 PM
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Originally Posted by Ws6kid.
I'm also doing a BMR ride height drop this weekend and ive herd that true duals and droped cars dont work so well...
So can i get some advice? on what i should do?


Any advice would be great.
Thanks,
Ws6Kid
TD's can work on dropped cars, they just have to be installed right. A custom system that follows down one side of the car will of course be best, but even pre-fabbed duals like TSP can work as long as you seat them right. A big problem is that if you don't get the slip-joints pushed far enough towards the front end of the car, your X-Pipe will sit just under the torque arm which forces them to hang low. Here is where clearance becomes a problem.
Old 10-08-2010, 02:04 PM
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I can sell you my panhard relocation kit to help with the true duals over the axle. PM me if interested. Here is a quick pic. Pay no attention to the sway bar kit being upside down. It's fixed lol.

Top bar with the brackets on the ride side.

Old 10-18-2010, 09:14 AM
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My 3inch ORY is getting beat up with the new lowering springs.
But my plan is to make about 500. hp on this motor
before i pull it out.
Old 10-18-2010, 11:38 AM
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I don't know how you could have missed this thread, but here it is...

https://ls1tech.com/forums/generatio...st-f-body.html

Expensive? Yes.

Exactly what you're looking for? Yes.

Take a look and see if its worth it to you.
Old 10-18-2010, 06:15 PM
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Yes, the new Kooks is an expensive but great system. And if you can't afford it, at least it does answer the question that you can run 3" true duals over the axle, as long as you relocate the panhard.
Old 10-19-2010, 05:13 PM
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thanks guys
and i will be buying this system soon
and ill post up! thanks!
Old 10-20-2010, 05:31 PM
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How about 2.5" over the axle? Will they fit or will a panhard relocation kit still be necessary?

Last edited by bigairboarder44; 10-20-2010 at 05:49 PM.
Old 10-20-2010, 05:47 PM
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I have an 02 z28 with true duals 2 1/2 all the way back both over the axle, Im running mine with 1 7/8 custon made headers, and with just the exhaust and a K&n filter it put down 349 rwhp ,not alot but decent for just exhaust, I went to a local shop here in AL and they did my whole exhaust for 200(just the pipes not headers) took 8 hours to bend and it clears everything by a mile! as far as cutouts I dont have any need for them, b/c the exhaust is PLENTY loud with no mufflers.
Old 10-21-2010, 09:48 PM
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Yea thing is that i plan on removing this engine and putting it on another car
so the 3inch all the way to the back would be great for a newer engine i plan on installing.
Old 10-21-2010, 10:37 PM
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there is a 35 page plus sticky on exhaust systems.a 2.5 exhaust system will handle 500 + hp.put the mufflers on after the axle.practice welding on some scrape metal.a exhaust system is a good project to do your self.

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