Engine Mods for a M70

Hi everyone, i have a questions regarding to M70 engines

I would like to modify the M70 to some decent horsepowers and i would like to keep it NA as much as possible. i have search through few tuners and the best they could come up with are power chips, which will only gain 30hps also. which isn't what i am after.

if someone here knows any one (with a price list even better) of modifications on M70 engines, new cylinder heads to help flow, or certain pistons or whatever that may acheive my aim at around 500 to 550hp, as i was told my manuel gearbox can only hold that much power.

thanks everyone's help.

have a nice day

http://www.koenig-specials.com/
http://dinancars.com

They'll get you more than a 30hp gain, if you can afford it. :D

There is a twin turbo S70 floating around (home-build) but if you want 600bhp and have 25,000+ Euro to spare... email me ;)

IMO, buy a CSi (380bhp, 6speed), go for the Hamann suspension kit, kick the cats and install a Hamann straight through exhaust (small HP gain) and have fun ;)