I have the ACT hdss and the pedal feels just a little stiffer than stock but nothing you can't get over. Also got the streetlite flywheel which is pretty good for me I thiought about the prolite but this is still my commuter. I can say that once you drop the accelerator and get into Vtec the tach jumps towards that 8000 rpm redline like it's his date on prom night. Can just imagine what the lighter flywheels are like.