I'd love to get a few lightened pulleys, but I'm concerned about the crank pulley. Any adverse affects from not using a harmonic balancer of sorts? I seem to recall the stock pulley having some rubber harmonics absorption material in it.
Yeah, before getting them, I read about the harmonics/dampening debate in these. I went for it anyway and hadn't had a problem in the 5 or so years they've been on the car. You won't get big gains, but you'll def feel it in the way the car drives even on a stock car.