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10-21-2017
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#1 |
Join Date: Dec 2007
Location: Fremont, CA
Posts: 3,087
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A question about dropping the exhaust?
I'm going to drop the exhaust to install the Hurst shifter and BB C Beam plates,what gaskets will I need at the exhaust collectors?
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10-22-2017
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#2 |
 Join Date: Jul 2005
Location: Watertown, CT
Posts: 46
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Re: A question about dropping the exhaust?
The right side is slip on and clamped. The left side is swaged on the rear pipe to mate with the header-cat oversize taper. Behind that swaging is a 3 hole clamp and 3 bolts tighten this clamp with the threaded header-cat flange to snug the joint together. There is no gasket. Most "cat-back" aftermarket exhausts connected the same way but what you find on any particular zr-1 could vary widely.
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1990 #1471 Founding #006 Former Membership Director NCM member Grand Sport registry |
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10-22-2017
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#3 | |
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Join Date: Dec 2007
Location: Fremont, CA
Posts: 3,087
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Re: A question about dropping the exhaust?
Quote:
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10-22-2017
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#4 |
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Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,843
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Re: A question about dropping the exhaust?
It is 3 bolts into a threaded flange. Prep well wth penetrating oil or you might break one off. Just did mine a few days ago.
H |
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10-22-2017
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#5 |
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Join Date: Jul 2005
Location: Watertown, CT
Posts: 46
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Re: A question about dropping the exhaust?
The flange on the cat is threaded. (Saving a thousand words)
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1990 #1471 Founding #006 Former Membership Director NCM member Grand Sport registry |
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10-22-2017
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#6 | |
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Join Date: Dec 2007
Location: Fremont, CA
Posts: 3,087
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Re: A question about dropping the exhaust?
Quote:
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10-22-2017
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#7 |
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Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,843
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Re: A question about dropping the exhaust?
Not so bad... worst case you drill the bolt out, rethread to next size, buy a new bolt.
H 
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10-23-2017
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#8 |
 Join Date: Aug 2015
Location: Magnolia, Texas
Posts: 884
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Re: A question about dropping the exhaust?
Wasn't a problem on my '91 when I swapped to SW headers and exhaust..
Sent from my XT1585 using ZR-1 Net Registry mobile app |
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10-24-2017
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#9 |
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Join Date: Apr 2013
Location: Eastern Missouri
Posts: 773
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Re: A question about dropping the exhaust?
When I did mine I just put a standard header collector gasket on it. Just for peace of mind...
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10-24-2017
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#10 |
 
Join Date: Feb 2012
Location: Ledyard,CT
Posts: 8,312
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Re: A question about dropping the exhaust?
Lately I have been dropping a lot of things; last night it was a tractor!
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