308 exhaust pipe flange gasket donut equivalent search

I looked into this for my 328 - my advice is to "bite the bullet". I'd also cover the new doughnut in copper grease whe you install it to try & prevent it from sticking to the pipe in case you think you might ever want to get the thing apart. They seem to "weld" themselves to the pipework.

 

I think I paid the equivalent of about $55 for 4 of them recently. They really wern't much more expensive than what I was looking at trying to find a match somewhere else.

 

You might want to get the size in mm and check with autohausaz.com. I think there is a BMW oring type seal from one of the older 5,6 or 7 series that fits. I had a guy at a BMW independent shop match up a couple for me but they were out of a big box of spares he had so I wasn't able to get a part number or application for that matter, but they were a good fit.

Cheers

 

That's strange. I recently replaced the donuts at the cat flanges with the Felpro 8194. For these connections, the Felpro ID is actually a little larger than the pipe -- not smaller. Maybe the mid-section pipe is a different size than at the cat connections? Maybe a different diameter from early cars to late? Sorry, I'm not able to offer anything constructive here. Maybe you can skim off a little material from the donut ID?

 

WE used some over the counter ones from White Brothers for my 328. I think they were Volvo? Ill have to ask later this week. Worked like a charm.

 

Bob Here is the size that you need, 71.39mm which is almost 3" in diameter. This is what I used on my QV
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http://www.superformance.co.uk/a-308/exhausts.htm

I got mine here for my '77 and they fit perfect. ~9L is ~ $14.4

 

Although I have not physically confirmed the application, here is the BMW cross reference for a 55mm donut..18-11-1-723-539 Looks like they may be little hard to find at the discount houses as most showed not currently in stock. You might be able to find one at a BMW Dealer just beware that with their pricing matrix they may boost the price up to the same level as the ones at Superformance. (spoken as a former BMW Parts manager who charged $4 for a brake light bulb)

http://www.pelicanparts.com/cgi-bin/smart/more_info.cgi?pn=18-11-1-723-539-M131&catalog_description=Exhaust%20Seal%20Ring%2C%2055mm%2C%20540i%20%281993-95%29%2C%20As%20Needed%2C%20Each

 

I went to my local exhaust shop yesterday and dropped 5$ for 2 donuts. They are exactly the size of what I removed from my GT4. I just carried the old one in and he matched it off his giant wall-o-gaskets. I *think* they came from a hook labeled 8717.

Try just walking into the shop with your parts and some cash.

Jonathan

 

I did buy the ones from Ricambi, they didn't fit, so I took the old one to the muffler shop, they matched up a set from stock. Still have the Ricambi ones, IF they'd fit yours, pay for shipping, and you can have them, they're brand new, un-used. I didn't return them because it's more trouble than it's worth. 1982 GTBi 2 cats, if that matters. Ciao
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That's good one! I found these from local car parts shop, as they had universal seals on stock and they fit fine.