Gasket for flanged cat...can't seem to find the proper one
Thread Starter
Joined: Dec 2005
Posts: 4,795
Likes: 15
From: St. Cloud, MN
Car: 1984 Trans Am
Engine: LS1383 in work
Transmission: Magnum F - to be installed
Axle/Gears: Zexel Torsen 3.73, 28-spline mosers
Gasket for flanged cat...can't seem to find the proper one
Hey guys,
The search seems to be down at the moment. I'm looking for the exhaust gasket that goes down on the cat where it bolts to the Y-pipe. I've got an 84 T/A with the single exhaust. My current connection is the 4-bolt flange. None of the part stores seem to be carrying what I need unless I"m looking for the wrong part. Does anyone know which gasket I need?
The search seems to be down at the moment. I'm looking for the exhaust gasket that goes down on the cat where it bolts to the Y-pipe. I've got an 84 T/A with the single exhaust. My current connection is the 4-bolt flange. None of the part stores seem to be carrying what I need unless I"m looking for the wrong part. Does anyone know which gasket I need?
Member
Joined: Jul 2006
Posts: 452
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From: West Palm Beach, FL
Car: 1986 Pontiac Firebird S/E
Engine: 305 carb'd V8
Transmission: 4-speed auto
Axle/Gears: Stock
Re: Gasket for flanged cat...can't seem to find the proper one
Didn't know there was a gasket between the cat and the intermediate pipe. I thought it was designed with the ball and flange for this same purpose.
Member
Joined: Jul 2006
Posts: 452
Likes: 0
From: West Palm Beach, FL
Car: 1986 Pontiac Firebird S/E
Engine: 305 carb'd V8
Transmission: 4-speed auto
Axle/Gears: Stock
Re: Gasket for flanged cat...can't seem to find the proper one
Ah wait! You have an 84. I think those didn't have the ball and flange and/or slip fits correct?
The y-pipe, cat' and intermediate all bolt on. I looked up the part no.s on Maremont's website for ya and it says that there is no gasket required. I remember doing this to another car I had before and I ended up just making my own gaskets out of a role of DIY gasket paper from Advance Auto.
The y-pipe, cat' and intermediate all bolt on. I looked up the part no.s on Maremont's website for ya and it says that there is no gasket required. I remember doing this to another car I had before and I ended up just making my own gaskets out of a role of DIY gasket paper from Advance Auto.
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Thread Starter
Joined: Dec 2005
Posts: 4,795
Likes: 15
From: St. Cloud, MN
Car: 1984 Trans Am
Engine: LS1383 in work
Transmission: Magnum F - to be installed
Axle/Gears: Zexel Torsen 3.73, 28-spline mosers
Re: Gasket for flanged cat...can't seem to find the proper one
There was one on there when I pulled the Y-pipe off...only problem is it came apart and practically disintigrated as I pulled the pipes apart. Looks like I'll have to cut my own I guess. No biggie, was just hoping someone knew a part number for the actual correct gasket.
Member
Joined: Jul 2006
Posts: 452
Likes: 0
From: West Palm Beach, FL
Car: 1986 Pontiac Firebird S/E
Engine: 305 carb'd V8
Transmission: 4-speed auto
Axle/Gears: Stock
Re: Gasket for flanged cat...can't seem to find the proper one
There was one on there when I pulled the Y-pipe off...only problem is it came apart and practically disintigrated as I pulled the pipes apart. Looks like I'll have to cut my own I guess. No biggie, was just hoping someone knew a part number for the actual correct gasket.
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Gasket for flanged cat...can't seem to find the proper one
The four-bolt is generally found on the L69.
JamesC
JamesC
Trending Topics
Joined: Sep 2007
Posts: 640
Likes: 3
From: Northern California
Car: 1985 California Iroc
Engine: HSR ZZ4 0411 swapped
Transmission: 4L60E
Axle/Gears: 3.23 posi
Re: Gasket for flanged cat...can't seem to find the proper one
i have the 4 bolt flang on my 85 iroc tpi origional exhaust. its listed as being the cat for the H.O. the 84,85,and 86 vette also share the same cat.i use DIY gasket material.
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Gasket for flanged cat...can't seem to find the proper one
JamesC
Joined: Sep 2007
Posts: 640
Likes: 3
From: Northern California
Car: 1985 California Iroc
Engine: HSR ZZ4 0411 swapped
Transmission: 4L60E
Axle/Gears: 3.23 posi
Re: Gasket for flanged cat...can't seem to find the proper one
was wrong on vette years its 82-85. but the length and mounting is identical. check out the link http://cgi.ebay.com/ebaymotors/Easte...spagenameZWD1V
Thread Starter
Joined: Dec 2005
Posts: 4,795
Likes: 15
From: St. Cloud, MN
Car: 1984 Trans Am
Engine: LS1383 in work
Transmission: Magnum F - to be installed
Axle/Gears: Zexel Torsen 3.73, 28-spline mosers
Re: Gasket for flanged cat...can't seem to find the proper one
was wrong on vette years its 82-85. but the length and mounting is identical. check out the link http://cgi.ebay.com/ebaymotors/Easte...spagenameZWD1V
Joined: Sep 2007
Posts: 640
Likes: 3
From: Northern California
Car: 1985 California Iroc
Engine: HSR ZZ4 0411 swapped
Transmission: 4L60E
Axle/Gears: 3.23 posi
Re: Gasket for flanged cat...can't seem to find the proper one
just make your own?
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Gasket for flanged cat...can't seem to find the proper one
Joined: Sep 2007
Posts: 640
Likes: 3
From: Northern California
Car: 1985 California Iroc
Engine: HSR ZZ4 0411 swapped
Transmission: 4L60E
Axle/Gears: 3.23 posi
Re: Gasket for flanged cat...can't seem to find the proper one
thats strange? maby the diffs vary from maker to maker? mine was exact?
Joined: Mar 2000
Posts: 5,703
Likes: 132
From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: Gasket for flanged cat...can't seem to find the proper one
He is correct, they were designed to be without a gasket. Even the 'vette used the same type.
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