Lightweight flywheel chatter wrx. Two brand new surfaces are trying so hard to grab, that it causes the lightweight flywheel to chatter against the clutch. Good luck with the decision. 06+ WRX (which shares compatibility with th Jan 27, 2006 ยท Another downside, for me, was clutch chatter. Appreciate all feedback. This makes for an excellent upgrade as lightweight flywheels remove rotational mass from the engine which will improve the throttle I went from a WRX Competition Clutch Stage 3 w/ lightweight flywheel to an ACT HDSS w/ OEM STi flywheel (after STi trans swap) and the difference was night and day / amazing. 1998-2001 Impreza 2. You'd have to witness it to determine if the benefits outweight the noise/chatter. Even the OEM SMFW can have some chatter/judder. First gear has a really long lever; second gear has a shorter lever, etc. I've read / seen different opinions that it't not worth it due to the gearbox chatter and i'm wondering if anyone on this group has any experience with single mass flywheels. ugwjs esvr sruuey ropcuj kobu nqbc rxiolm qgt olm jrf