I want to put dual exhaust on my 81 with a power driver's seat. Do I have to route both the exhaust pipes under the passenger seat like the stock setup, or is there a way to make straight pipes on both sides?
I think you needs to run both pipes on the passenger side. i don't remember what it is, but seems to me there is something in the way on the driver side preventing it from running that way. Mine are both on the passenger side. For some reason the crossmember comes to mind.
I was told that to provide more driver-side head room, driver-side seats are a bit 'lower', mandating all exhaust goes down passenger-side.Sounds plausible..... :confused:
Location: Murfreesboro, TN Corner of "Bumf*&k and 'You've got a purdy mouth'."
Re: 81 dual exhaust (Dalannex)
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I think you needs to run both pipes on the passenger side. i don't remember what it is, but seems to me there is something in the way on the driver side preventing it from running that way. Mine are both on the passenger side. For some reason the crossmember comes to mind.
-Justin
Yes, 1980 - 82 the crossmember only has 1 place to route exhaust, and that is on the passenger side. The only other solution is to cobble a pre-1980 crossmember into place like I did. They are not a direct bolt in.
Location: Murfreesboro, TN Corner of "Bumf*&k and 'You've got a purdy mouth'."
Re: 81 dual exhaust (Glensgages)
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I was told that to provide more driver-side head room, driver-side seats are a bit 'lower', mandating all exhaust goes down passenger-side.Sounds plausible..... :confused:
No, they just changed to a MUCH lighter crossmember and only allowed one place to route the exhaust. Not much care by GM since they were only building 3 model years like this and couldn't do duals anyway.
The exhaust is actually pretty close to the transmission tunnel and almost against the trans on mine and does not go under the seat.
No, they just changed to a MUCH lighter crossmember and only allowed one place to route the exhaust. Not much care by GM since they were only building 3 model years like this and couldn't do duals anyway.
The exhaust is actually pretty close to the transmission tunnel and almost against the trans on mine and does not go under the seat.
Thanks, BSeery. I recently saw an '82 C.E. on a lift after getting true-duals (2.5", no cat OR mufflers for $150.00!!!). The owner told me of the 'low-seat' theory. On this car, it DID look as if driver's-side floor-pan was lower than passenger-side. I guess I 'bought' it....
No, they just changed to a MUCH lighter crossmember and only allowed one place to route the exhaust. Not much care by GM since they were only building 3 model years like this and couldn't do duals anyway.
And No again, driver-side seat doesn't sit lower but the motor and bracket take more room than passenger-side so the floor pan is deeper and comes in way when you are installing duals. Don't know about crossmember since I don't have stock one.
I have duals installed and only problem is that driver-side pipe touches the pan. That I deal with little heat barrier installed between them, it also prevents pipe hitting the pan on idle as it's vibrating.
I have 2.5" true duals, no cats, H pipe, and headers on my 1980. No seat clearance issues. Just get a dual hole automatic frame cross member from a 1979 or older. It bolts on with some modification. You will also need the perch (mounting bracket) that the trans sits on that bolts to the cross member. I have a dual hole cross member (no perch) if you are interested, webmaster@vettesite.com
81 dual exhaust
