How about something completely insane?
A 3.4lt stroker kit! Claimed minimum power gains of +27lb/ft torque from 2,000 rpm to redline and a minimum horsepower gain of 18+ HP at 8000 rpm. Terrible value or money compared to a supercharger kit but i still think it's extremely cool.
Doubt if anyone will get one but if you do i want to hear about it!
S54 3.4 Liter Engine Stroker Kit for E46 M3 & MZ4
$6,995.00
http://www.turnermotorsport.com/html...54-STROKER-KIT
