I weighed my stock B16 flywheel & it was 18 lbs .. I've been on my 7 lb flywheel for 2+ years & I've always loved everything about it.

I drive mine daily, I don't have trouble launching my car, & the lightened flywheel didn't have any adverse affects on my powerband; it actually picked up like 4 WHP/TQ cause I had dyno'd it before & after.