[Henry Schmidt]

We only use the finest gaskets sets from Wrightwood Racing. Because every kit is made to order, there are no extra gaskets included. The reason you have extras is because the kit you bought is generic and made to fit two different years. I think you'll find that the gaskets are two different sizes. The smaller id fits early 930 exhaust and the larger id fits the later exhaust. If they are the same size they were packaged incorrectly.
Good luck.
PS: this gasket should fit snugly around the flange on the header.