I bought a fidanza fly wheel w/ rps 6 puck clutch. Its worth it IMO. Car feels lighter, the rpm goes up quick. Also drops down fast though. doesnt really make the car much faster, but a more fun to drive. search on da forums bout flywheels.
FYI, the lightened flywheel will only help acceleration in the lower gears (1-3) where the engine has a chance to change speeds quickly. Don't expect to see a real difference at highway speeds(gears 4 and up) or on a dyno. This is all oversimplified of course. My brother has one on his supercharged Maxima and the revs rise and drop much easier making it harder to shift smoothly, but the more free-revving nature of the engine is worth it.
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