FlyWheel?
u'll see possible hp gains and faster rpm gains, as well as higher rpm capability, you will see lower torque though, using a lighter flywheel causes ur engines moving components to spin easier but with less force. on an accord which may need the higher torque its ur call, if u had a little car like a crx or a civic id say go for it, but if u drive around with passengers often then ????
Do you live where it's very hilly? Mountains or foothills? If so I would keep the stock flywheel, the extra weight keeps the momentium on the rotating assembly so you don't have to go down 2 gears or run WOT to get to the top of the hill. Just my .02


