Want power

Good luck ...
If you are talking 430 Engine HP .. You should be able to do that with stock heads .. just a cam, pulley, headers, lid and tuning ..
Crowley
and remember, peak HP isn't everything... area under the curve matters as much if not more than peak numbers. Also, all the HP in the world isn't going to do you any good without the proper suspension, gears, tires, clutch, driveline, etc. to put it to the ground effectively.
Lastly, with that kind of power, definitely get a 12 bolt. If you set up a car up with that kind of power to launch properly, you'll grenade your 10 bolt for sure on an M6.
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