Holley needle and seat O-ring???
 

Anyone have a part # or a size for the o-ring that goes on the needle and seat assembly on a Holley 4150 style carburetor? Some said it was a 008 o-ring so I bought some but they don't seem as thick or stand out of the groove as much as the factory o-rings. Looked all over and cannot find a Holley part # or spec. Holley sells them with the kit that has the hex,screw and gaskets but I can't find them separate.

Re: Holley needle and seat O-ring???
 

The material they use is very important with today's fuel.

Re: Holley needle and seat O-ring???
 

Re: Holley needle and seat O-ring???
 

I believe it might be made of unobtanium.

Re: Holley needle and seat O-ring???
 

I am almost certain they are in the catalog, I will look in the AM. AED probably has them too.

Re: Holley needle and seat O-ring???
 

https://blp.com/cart/index.php?main_...ort=20a&page=4

BLP sells them. You might look into their needle and seats also they are superior to holleys.

Re: Holley needle and seat O-ring???
 

Well I lied . . . . dont see them anywhere in the Holley catalog or the big illustrated parts book I have :(

Re: Holley needle and seat O-ring???
 

I spent almost 1 hr on the phome with Holley, mostly on hold. The guy was pretty good but they don't list them or sell them separate. He did give me the dimensions. ID .171-181 OD .310 thickness .067-.073. I ordered some from the outside supplier.

Thanks to everyone for the help.

Re: Holley needle and seat O-ring???
 

I like Chevy55's link.