I had a set fitted a few years back. There was a thread a while back saying that the LW pulley's dont have the damper in the crank pulley, so a lot of people were put off them. Iv never had any problems with my engine, and have a LW flywheel too now, car is so much more responsive, and revs alot easier. The crank pulley was abit of a pig to replace apparently, but that was the hardest one. Put it this way, my mechanic refused to fit HEL braided lines as he thought they were unsafe, yet had no issues or anything with fitting the pulley's.