[Bugnutz]

JR,

Those bolts are 14x1.5 and 80 mm long.

I just used the stock beetle IRS pivot bolts after swapping the aluminum trailing arm's rubber bushings for some urethane units made for the beetle. These bushings have a larger inner bore than the Porsche units due to the beefy shoulder on the beetle pivot bolt.

With the aluminum trailing arms you will need to use the Porsche spring plates due to differences in the bolt pattern where they attach to the trailing arm.

The rubber bushings are bonded on to the Porsche spring plates. If you cut/grind/burn them off you can use rubber or urethane spring plate grommets and the spring plate retainer for a beetle. I ended up using the inner urethane bushing for a beetle, an aftermarket hard plastic outer bushing for the 944, and cut-down aluminum 944 spring plate retainers.

-Mark.