LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

True Duals on Stock Manifolds

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Old Sep 1, 2006 | 08:58 PM
  #1  
94 Z KING's Avatar
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True Duals on Stock Manifolds

ok so i got a 94Z and i was wonderin how much would it cost to put a true dual exhaust wit a X or H pipe and then the bullets muffler with turn downs. also does anyone have any pics. thanks
Old Sep 1, 2006 | 09:02 PM
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Re: True Duals on Stock Manifolds

Kid in DFW had one done up with an x pipe and it did sound pretty good. He paid around 600$ for parts and labor.
Old Sep 1, 2006 | 09:06 PM
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Re: True Duals on Stock Manifolds

ok well $600 is a bit too much for me to pay , is there any possible way to make it cheaper??
Old Sep 1, 2006 | 09:10 PM
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Re: True Duals on Stock Manifolds

Uhmm, it would be absoultely pointless. The manifolds are more of a restiction than you seem to think.

Making a True-Dual exhaust, bolted to the stock manifolds, would be like if you could make the perfect girl, and then[edit]. It just doesnt make sense ...

Stock Manifolds are a HUGE restriction in the exhaust flow. I would think, going true duals on the stock manifolds would show you next to no gain over any other cat back.

Last edited by Injuneer; Sep 2, 2006 at 11:35 AM.
Old Sep 1, 2006 | 09:59 PM
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Re: True Duals on Stock Manifolds

Originally Posted by HardcoreRM125
Uhmm, it would be absoultely pointless. The manifolds are more of a restiction than you seem to think.

Making a True-Dual exhaust, bolted to the stock manifolds, would be like if you could make the perfect girl, and then [edit] It just doesnt make sense ...

Stock Manifolds are a HUGE restriction in the exhaust flow. I would think, going true duals on the stock manifolds would show you next to no gain over any other cat back.
i agree 110% ditch the Manifolds

Last edited by Injuneer; Sep 2, 2006 at 11:36 AM.
Old Sep 1, 2006 | 10:41 PM
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Re: True Duals on Stock Manifolds

i did it until i got my headers. it sounds good and gives you way more power down low. IT IS WORTH DOING. dynomax bullet mufflers are 34 a peice. and the x pipe is 33 in summit. so your looking at 100$. i got my guy to install it and he charged 110 to fab it up.

so 210 NOT 600.

catbacks your looking at way more money.

sounds better than any cat back you will buy. and if you ever get longtubes you just cut it back and hook it up to the collecters.

btw use 2 1/2 inch pipes 3 inch will kill the torque and cut your ground clearace.
Old Sep 1, 2006 | 11:09 PM
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Re: True Duals on Stock Manifolds

ok critter thanks for all ur help and yeah 210 does sound alot better than 600
Old Sep 1, 2006 | 11:18 PM
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Re: True Duals on Stock Manifolds

3" pipes are not going to hurt anything down low.

And ask Critter if he had a good catback on first to compare too? Your not going to get the gain you think you will doing it like this.

And I can garentee you that for $210, its dumped before the axle. If you want your exhaust to be true dual out the back, its oging to cost you alot more. Many shops wont even do it.

And if you have to pass emissions, you cant do it. It wont pass visual.
Old Sep 1, 2006 | 11:20 PM
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Re: True Duals on Stock Manifolds

3" is worse then 2 1/2? i dn dude...... why would it kill ur torque? does anyone else agree with this?

first get headers....longtubes and then get the true duals..... yea dude 3" i think is better....... also i believe it might cost a lil more then $210 i'd say round $300 for buy and install
Old Sep 2, 2006 | 12:59 AM
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Re: True Duals on Stock Manifolds

Originally Posted by HardcoreRM125
3" pipes are not going to hurt anything down low.

And ask Critter if he had a good catback on first to compare too? Your not going to get the gain you think you will doing it like this.

And I can garentee you that for $210, its dumped before the axle. If you want your exhaust to be true dual out the back, its oging to cost you alot more. Many shops wont even do it.

And if you have to pass emissions, you cant do it. It wont pass visual.

1. 3 inch is overkill, more expensive, and will cut ground clearance. you don't need duel 3 inch until you get in to the huge hp. no backpressure = no torque. i know guys that had 3 and 2 1/2 and there was a noticable difference in the 3 and 2 1/2 torque.

2. he specified dumped not over the rear.

3. u can notice a gain. i had a sotp gain.
Old Sep 2, 2006 | 01:07 AM
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Re: True Duals on Stock Manifolds

Originally Posted by CamaroRacing12
3" is worse then 2 1/2? i dn dude...... why would it kill ur torque? does anyone else agree with this?

first get headers....longtubes and then get the true duals..... yea dude 3" i think is better....... also i believe it might cost a lil more then $210 i'd say round $300 for buy and install
it would be nice to get headers and tru duals at the same time. but some people are poor . i went duals in manifolds for the sound and got a gain, later i went to the headers. go for it.

i spent $210 thats all i know. when you say around 300? have you had this done, do you know someone? took my guy 30 min.
Old Sep 2, 2006 | 09:57 AM
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Re: True Duals on Stock Manifolds

Critter, even if he goes to 3" pipes, he is still going through the stock manifolds. THere would be tons of back pressure. I just figured, you mind as well go big now. It cant hurt anything later.

Besides, even when I drove my car with open headers for a couple weeks, the difference in torque was pretty small. I mean, yea you can tell, but the point im trying to make is that its not gonna feel like he's driving a neon if he goes with 3"ers ...
Old Sep 2, 2006 | 11:38 AM
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Re: True Duals on Stock Manifolds

Originally Posted by Critter
1. ...... no backpressure = no torque.
You don't really believe that, do you?
Old Sep 2, 2006 | 11:48 AM
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Re: True Duals on Stock Manifolds

FWIW, I'm pleased with the results of true duals with stock manifolds.
If I remember correctly the true duals were worth 7-8 rwhp over the
3" cat back setup with the 80 series flowmaster. I did port match the
manifolds and open up the outlets.
Old Sep 2, 2006 | 12:39 PM
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Re: True Duals on Stock Manifolds

The 600$ I quoted was for out the rear. Dumped before the axles is illegal in most states im sure.



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