BillH wrote:
Quote:

VtVette wrote:
Bill thanks for the info - would a new cap/rotor come with the O-ring?

Can any Opti use either the round or square O-ring or are there differences between an early or later MSD Opti?

MDS will sell parts directly to a customer? If so I'll order a cap/rotor and pick up a square seal directly from MSD if they do not come with the cap.

thanks again for the info Bill,

Brian

Brian, I never bought a cap & rotor, so don't know if the o-ring comes with it or if they also will sell the cap,etc.
I do know Summit doesn't have the o-ring separate.

There's no difference in the optis, just the o-ring. Thr round one just won't stay on the shinny aluminum, keeps slipping off while you're trying to install the cap. This was changed quite a while ago. The sq. one stays in place.

Call the tech line and ask about the cap then they'll switch you over to the order desk.
915-855-7123

The p/n for the o-ring is HDW28151, $1.25e.
I got 2 shipped for $7.50.