Repainting the supercharger for my HHR and found that the bypass gasket came off in two pieces. Does any one know the part number for this? Its the small round green one.
Thanks.

 

If it's a supercharger, then it's aftermarket. Contact the manufacturer or their local supplier.

 

If you meant turbo, then try looking for parts on a site like gmpartsoutlet.net.

 

It's a M-62 off a cobalt.

 

Have you tried the Cobalt forums?

 

May I suggest you try your question at another forum site. The Cobalt SS forum site maybe.
Since the HHR's never came with a supercharger, I doubt that many of our members here will have(or know) any info to help you.

 

If it is a stock Cobalt SS part, my suggestion still stands!

 

ZZPerformance - Supercharger Coupler #ZZ-SCCPLR,

 

It is a Air Bypass valve oring, PN 12584333
Crate engine depot has them