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Z51JEFF
10-22-2017, 12:19 AM
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?
bhedberg
10-22-2017, 03:07 AM
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.
Z51JEFF
10-22-2017, 04:53 AM
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.

On the 3 bolt flange are these through bolts and nuts,not studs and nuts? Thank so much for the info.
Ccmano
10-22-2017, 11:50 AM
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
bhedberg
10-22-2017, 01:15 PM
The flange on the cat is threaded. (Saving a thousand words)

http://www.wallhost.net/ns/images/exh-1.jpg
Z51JEFF
10-22-2017, 02:07 PM
The flange on the cat is threaded. (Saving a thousand words)

http://www.wallhost.net/ns/images/exh-1.jpg

That's what I was afraid of,with my luck I hear a snapped bolt in my future.
Ccmano
10-22-2017, 06:43 PM
Not so bad... worst case you drill the bolt out, rethread to next size, buy a new bolt.
H
:cheers:
jss06c6
10-23-2017, 08:24 AM
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 (http://r.tapatalk.com/byo?rid=90383)
Racinfan83
10-24-2017, 07:41 AM
When I did mine I just put a standard header collector gasket on it. Just for peace of mind...
BigJohn
10-24-2017, 12:01 PM
Lately I have been dropping a lot of things; last night it was a tractor!
Racinfan83
10-24-2017, 11:06 PM
Lately I have been dropping a lot of things; last night it was a tractor!

Come on man - you can't tease us like that without an explanation/pics...:-D:cheers:;)