The OEM gasket on both my H3's was just like a lube locker gasket. I re-used it on the Alpha. On my adventure the G2 Brute has it's own built in gasket. The normal G2 is around 100-120, and yeah the G2 Brute is 200-250 (I grabbed one for 20.00!!!!!!!!!!!!!!!!!!). I have used the Warn half diff guards and yep eventually you'll have a little garden growing out of those. I did replace all the bolts on my Diff covers (had to anyways due to length or in the G2 Brute's case (missing). I went with the strongest Metric bolts I could grab.