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Collector Gaskets

Started by S7MS427, July 17, 2022, 11:57:24 AM

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S7MS427

Reinstalling the Tri-Ys on my Hertz car.  A 3 inch collector gasket is to large and a 2.5 inch is too small.  Before I go ordering something else, what is the correct size and does anyone have any suggestions as to what to buy?  Headers are back in place and tightened down on the heads.
Roy Simkins
http://www.s-techent.com/Shelby.htm
1966 G.T.350H SFM6S817
1967 G.T.500 67400F7A03040

Royce Peterson

Quote from: S7MS427 on July 17, 2022, 11:57:24 AM
Reinstalling the Tri-Ys on my Hertz car.  A 3 inch collector gasket is to large and a 2.5 inch is too small.  Before I go ordering something else, what is the correct size and does anyone have any suggestions as to what to buy?  Headers are back in place and tightened down on the heads.

You can get the ones that fit properly from Tony Branda.
1968 Cougar XR-7 GT-E 427 Side Oiler C6 3.50 Detroit Locker
1968 1/2 Cougar XR-7 428CJ Ram Air C6 3.91 Traction Lock

S7MS427

Thanks Royce. I was going to call them tomorrow.  Any clue as to what size they are?
Roy Simkins
http://www.s-techent.com/Shelby.htm
1966 G.T.350H SFM6S817
1967 G.T.500 67400F7A03040

Royce Peterson

Quote from: S7MS427 on July 17, 2022, 12:42:18 PM
Thanks Royce. I was going to call them tomorrow.  Any clue as to what size they are?

They are unique to the Shelby Tri-Y header. After you get them you can measure the diameter but it's not something you can buy anywhere else.
1968 Cougar XR-7 GT-E 427 Side Oiler C6 3.50 Detroit Locker
1968 1/2 Cougar XR-7 428CJ Ram Air C6 3.91 Traction Lock

gt350shelb

if you are not worried about original you can make them from sheet of .060 copper  and then never need to replace them .
Some where some one is driving their collector car for the last time but they don't know it . Drive your car every time like it could be the last memory of it .

Bob Gaines

These are what I use and they are not custom or unique to Shelby tri y headers and you should be able to source them from many places .  " Mr. Gasket 76 Collector Muffler Gasket " and I used the easy button and got them got them from Amazon but Summit Racing and no doubt others carries them too . They fit "Original" Tri Y headers perfectly . I cant say whether they will fit repro versions well or not.
Bob Gaines,Shelby Enthusiast, Shelby Collector , Shelby Concours judge SAAC,MCA,Mid America Shelby

S7MS427

Thanks for all the advice.  I'll contact Brands tomorrow.
Roy Simkins
http://www.s-techent.com/Shelby.htm
1966 G.T.350H SFM6S817
1967 G.T.500 67400F7A03040

S7MS427

OK, did some test fitting on the 2 1/2 gaskets I have.  They fit and we are in the home stretch now.  :D  So when I get back from vacation in a couple of weeks, we'll get the car back on the road.

The reason for removing the headers was to gain room in order to remove the transmission.  The transmission needed to be rebuilt to cure it from leaking.  You can read about that experience on my website (see link in my signature below).
Roy Simkins
http://www.s-techent.com/Shelby.htm
1966 G.T.350H SFM6S817
1967 G.T.500 67400F7A03040