I will be installing a BRZ LSD Differential on my IS250 soon. My question is, does the Diff cover need a gasket? If so, what is the factory part number? I can't seem to find one. Or do you use "gasket maker" to seal the diff cover? I'm planning to change out all seals before the install.

I only found one company who sells a diff gasket but it's hella expensive to ship to hawaii. The gasket is $14 but shipping is $40. Go figure!!

Any insight will be greatly appreciated.