TPIS Header Fitment
Thread Starter
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
TPIS Header Fitment
Guys,
who here is running TPIS headers?
I did a 4L80E swap on my car last year and am trying to determine if my transmission adapter is causing my drivers side header to be closer to the footwell than the passenger side. The difference is about an inch. When i disconnect the trans from the C-beam, which i would think would allow the trans/engine to return to their "normal" positions, the difference remains about the same. Do TPIS headers naturally run closer to the drivers side? The reason is I want to V-band the exhaust at the header to make it seal, and the V-band clamp will not clear the footwell without contacting the floor pan
Wondering if i twisted a motor mount somehow, or something else is causing it to be offset. See pic below.
Thoughts?
who here is running TPIS headers?
I did a 4L80E swap on my car last year and am trying to determine if my transmission adapter is causing my drivers side header to be closer to the footwell than the passenger side. The difference is about an inch. When i disconnect the trans from the C-beam, which i would think would allow the trans/engine to return to their "normal" positions, the difference remains about the same. Do TPIS headers naturally run closer to the drivers side? The reason is I want to V-band the exhaust at the header to make it seal, and the V-band clamp will not clear the footwell without contacting the floor pan
Wondering if i twisted a motor mount somehow, or something else is causing it to be offset. See pic below.
Thoughts?
Last edited by Pwnage1337; Mar 8, 2018 at 04:02 PM.
Thread Starter
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
Yes my headers have small flat spots on the bottom of them, from a muffler shop tightening the flying **** out of some band clamps trying to make them seal. Lol
Last edited by Pwnage1337; Mar 8, 2018 at 04:01 PM.
Race Director
Joined: Apr 2003
Posts: 17,701
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From: moraga ca
I would get the headers hot without the y-pipe and with a prybar on the drivers side, move the collector over a half inch. You can protect the fiberglass with a 1/4" piece of plywood. On the passenger side, with your shoes, move the collector toward the outside a half inch. This will center the exhaust. The pipes really aren't that hard to massage.
Race Director
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From: moraga ca
Burning Brakes
Joined: Nov 2015
Posts: 762
Likes: 94
From: Airdrie Alberta
You could use header wrap. I've wrapped my exhaust, keeps the floor on my car cooler.
You could easily just cut one side of the exhaust (opposite side to the tight side), push over and reweld. Looks like you have lots of room.
I built my own 3in exhaust, there lots of room under there.
You could easily just cut one side of the exhaust (opposite side to the tight side), push over and reweld. Looks like you have lots of room.
I built my own 3in exhaust, there lots of room under there.
Team Owner
Joined: Sep 2001
Posts: 62,186
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
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There was some issue with fitting the TPiS Y pipe on it originally on one side, required a few taps from a mallet, but I don't recall any others. I eventually had a custom dual setup welded in and ditched the Y.
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Burning Brakes
Joined: Oct 2010
Posts: 1,037
Likes: 28
From: Montclair New Jersey
I did the same thing. The Y pipe sucks. I welded 3 bolt flanges to the headers.
Burning Brakes
Joined: Oct 2010
Posts: 1,037
Likes: 28
From: Montclair New Jersey
Mine were actually the other way. My passenger side was closer. I ran the car and gently massaged it over to make it even. The Y pipe wasn't even close. It barely made it on the passenger side with the band clamp. The headers are great and the performance is worth the install.
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From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
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FWIW...exhaust shops just use oxy to heat/bend
Edit: OK...OK....Gotta say it....If MY exhaust got red-hot at fast idle, I'd be checking mixture and/or timing (retarded).
Last edited by GREGGPENN; Mar 11, 2018 at 07:26 PM.
Thread Starter
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
I'm going to attempt to bend these bitches tomorrow. I need to be careful not to bend too much because where the headers are right now allows for perfect pipe fitment in terms of trans clearance. By moving them to the right I will definitely have to clearance the drivers side pipe to clear the pan of the 4L80E. Shouldn't be too big of an issue
Burning Brakes
Joined: Oct 2010
Posts: 1,037
Likes: 28
From: Montclair New Jersey
Nobody said red hot. The headers get hot very fast with the car running. If you hit them with a torch it should only be for a few seconds. I don't know if that would ruin the ceramic coating. Just take your time.
Race Director
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From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
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