Ive been looking at a 91 3.6 US spec M5 with about 120k. The guy told me that it dyno'd at about 290 rwhp, but that seems pretty high doesnt it? It only has a powerchip, high flow cat, and eisenmann exhaust. I recently read of someone with a 3.8 with a chip and intake and they made less than that? Also other than the usual stuff (clutch, brakes, etc.) is there anything else I should ask him about particularly?