I'm looking for an upgrade for my clutch as the current one slips under hard power shifting (2-3 & 3-4). I would like to replace the clutch, add a short shift kit, then potentially add either a super charger or turbo if the SC is not available. As you can tell, I really wanted an M5 but could't justify the $. I'll see how close I can get my 545 to M5 performance. If no SC or turbo options then I'll have to settle for intake and exhaust mods to get a few extra HP but the SC/turbo is much more efficient Hp/$.

Any E60 V8 tuners out there?