i heard they shatter oil pumps pretty easy. and it seems like most people are having problems with high revving built engines on forums. I just ordered one from HMO for my daily b20.....the guy i talked to said it should be fine using it on a daily driver as long as i don't use a lightweight flywheel along with it and that it has also been pre balanced but with no rubber dampener. Any body else have experience using this pulley on a b20 with MINOR mods? Any info would be much appreciated!