I have gone down this path with precisely what you seek as well as supercharging another of my Bimmers. I most strongly recommend you spend the extra money on a Dinan Supercharger (and it is a LOT MORE) than you are thinking but recession can be your friend here. And remember, with more power comes an immediate need for bigger and better brakes, suspension off the bat. Then there are coolant issues, radiator, exhaust and a car with the hard top itself. Again, they are out there, but if you do it right, at best it costs a very decent sum of $$. If you do go Dinan, you will not be sorry as the way they stand behind their products is HUGE compared to the others (again, I've learned this first hand). If any of the pictures or specs of my M3 are helpful, please go look at my "at Long Last" thread in Bimmerwerkz' M3 forum. I wish you the best of luck with this - I for one am THRILLED by having my M3 each and every day. Enjoy!
2008 ///M5 with Eisenmann race exhaust "Athena" 2013 VOLKSWAGEN Tiguan 2L Turbo RIP 2005 Dinan ///M3 S3-R+ Vert w/hardtop
- 6-speed, DINAN SC - race kit, race headers, etc. RIP 2002 Z3 Roadster 2.5i - VF Supercharged
, 5-speed, Brembos etc. Turkey ///M Car Fleet Commander
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