[timsullivan]

I just bought the complete "Cobra" center cap assembly from Finish Line. I don't think the cheaper insert will work with the original Superformance center cap as it doesn't look like it comes apart.

When I tried to mount the new center cap I had a bit of trouble getting it to mount flush with the aluminum wheel center spoke area. The O ring was hanging it up ever so slightly. A quick dab of dielectric on the O ring allowed it to slip on and in tightly and securely, fitting completely flush up against the hub area.