READ the link posted in the first response to your post. You buy the APPROPRIATE clutch for your car and in this case, buying an "upgrade" is actually a downgrade. If you wear a size 10 shoe, that is what you buy....same rule is with clutches. If you have or are planning in the very near future a significant torque upgrade in your car, THEN you can buy and use something upgraded (and NO....stage 2 is not a significant torque upgrade) and aside from that, a lightweight flywheel has several detractions such as mucho noise, having to rev much higher to take off, and CELs for missifires.