TPIS headers, and TPIS front Y-pipe.
Thread Starter
Team Owner
Joined: Jul 2003
Posts: 24,650
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TPIS headers, and TPIS front Y-pipe.
Got a quick question for the exhaust gurus.
on an 85, if you put on the TPIS LT headers, and their front Y pipe with the 4 bolt flange that hooks to the front of the stock cat, what options are there for having true duels?
Or is it best to just give up on true duals in lieu of easy install and good fit..and convince a muffler shop to make a "test pipe" to replace my hollow shell of a cat?
on an 85, if you put on the TPIS LT headers, and their front Y pipe with the 4 bolt flange that hooks to the front of the stock cat, what options are there for having true duels?
Or is it best to just give up on true duals in lieu of easy install and good fit..and convince a muffler shop to make a "test pipe" to replace my hollow shell of a cat?
Pro
Joined: Jan 2003
Posts: 663
Likes: 118
From: Albany OR
Here is what I did. I had may local muffler shop cut off the 4 bolt flange and run dual pipes, 3" in my case, all the way back to my mufflers. As you can see I had an H pipe put in near the front by the transmission. It works well for me. The flanges near the back below the differential are so that the system can be taken apart in smaller pieces.
Brian
From the front
From rear
Brian
From the front
From rear
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
On my 85, I went with TPiS headers and the TPiS 86 Y pipe. The 86 has a slip fitting for the cat. I then installed an 86 Magnaflow high flow cat and Corsa cat-back. The installation was simple. I went this route because I wanted the Corsa system and Corsa does not have a system for the 85.
Pro
Joined: Jan 2003
Posts: 663
Likes: 118
From: Albany OR
Brian
Melting Slicks
Joined: Apr 2007
Posts: 2,616
Likes: 111
I went w/the TPIS full exhaust system from the headers on back......they have a nice kit to match up with their headers, IMO......I know some of you folks are Flowmaster bashers, but I have a real nice exhaust note on mine and the Flowmasters they have in the catalog are three chamber....not obnoxious at all really......the Random Tech hi-flow cat they have works real well too (if you have to run a cat).....a little pricey but the only drawback I have to the whole system is the black paint....pretty much sucks as it flakes with heat at the rear y where it branches off.....
I must admit, I like the true dual system above too.....looks like a nice set up....
I must admit, I like the true dual system above too.....looks like a nice set up....
Melting Slicks
Joined: Apr 2007
Posts: 2,616
Likes: 111
Here is what I did. I had may local muffler shop cut off the 4 bolt flange and run dual pipes, 3" in my case, all the way back to my mufflers. As you can see I had an H pipe put in near the front by the transmission. It works well for me. The flanges near the back below the differential are so that the system can be taken apart in smaller pieces.
Brian
From the front
From rear
Brian
From the front
From rear
Hoosier 275/40F, 315/35R
Not to hi jack this thread (hopefully I added something above based on my experience with my project 85 car's exhaust), but can I get a glimbse of those wheels on your 85 you mention above?? I am really trying to find an 11 rear wheel for my 85 (chrome ZR1 preferred) to fit on the car (no spacers)....I am running 9.5" chrome ZR1's on all four currently.....
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From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
In my reasoning, If you are going to cut up a perfectly good Y pipe, and the TPIS Y pipe is the same pipe diameter as the original pipe, why go to the expense of getting a TPIS Y pipe only to cut off the engineered bends?
Use the factory Y pipe to chop up, you won't make any more ponies cutting a factory 2.75 diameter pipe, or a TPIS 2.75 diameter pipe that's 18 inches long.
The factory piece is stainless, then have dual cats staggard under the car to keep them in the tunnel.
Then mufflers of your choice.
Use the factory Y pipe to chop up, you won't make any more ponies cutting a factory 2.75 diameter pipe, or a TPIS 2.75 diameter pipe that's 18 inches long.
The factory piece is stainless, then have dual cats staggard under the car to keep them in the tunnel.
Then mufflers of your choice.
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
In my reasoning, If you are going to cut up a perfectly good Y pipe, and the TPIS Y pipe is the same pipe diameter as the original pipe, why go to the expense of getting a TPIS Y pipe only to cut off the engineered bends?
Use the factory Y pipe to chop up, you won't make any more ponies cutting a factory 2.75 diameter pipe, or a TPIS 2.75 diameter pipe that's 18 inches long.
The factory piece is stainless, then have dual cats staggard under the car to keep them in the tunnel.
Then mufflers of your choice.
Use the factory Y pipe to chop up, you won't make any more ponies cutting a factory 2.75 diameter pipe, or a TPIS 2.75 diameter pipe that's 18 inches long.
The factory piece is stainless, then have dual cats staggard under the car to keep them in the tunnel.
Then mufflers of your choice.
Pro
Joined: Jan 2003
Posts: 663
Likes: 118
From: Albany OR
CCW Classic, 17x10F, 17x11R
Hoosier 275/40F, 315/35R
Not to hi jack this thread (hopefully I added something above based on my experience with my project 85 car's exhaust), but can I get a glimbse of those wheels on your 85 you mention above?? I am really trying to find an 11 rear wheel for my 85 (chrome ZR1 preferred) to fit on the car (no spacers)....I am running 9.5" chrome ZR1's on all four currently.....
Hoosier 275/40F, 315/35R
Not to hi jack this thread (hopefully I added something above based on my experience with my project 85 car's exhaust), but can I get a glimbse of those wheels on your 85 you mention above?? I am really trying to find an 11 rear wheel for my 85 (chrome ZR1 preferred) to fit on the car (no spacers)....I am running 9.5" chrome ZR1's on all four currently.....
Brian
Last edited by VanSpeed; Nov 22, 2009 at 07:03 PM. Reason: fix spelling error
Pro
Joined: Jan 2003
Posts: 663
Likes: 118
From: Albany OR
I had used the TPIS Y-pipe for a number of year with the stock cat, gutted later, and when I went to the current engine I wanted and needed dual 3" all the way back to the mufflers so cutting the TPIS Y-pipe was an easy way to handle the situation.Brian
Team Owner
Joined: Jul 2004
Posts: 28,432
Likes: 3,285
From: Hartford WI
OTOH, if someone can prove to me that there is significant gain to be had and the loss of clearance and effort are worth it, I'd love to see it. If it gains 1/2 HP, is it worth it? Well, if I were a race car and there is a huge purse, absolutely. OTOH, if you tell me I have to hack up the exhaust just to impress the rice boys, I don't think so.
