The turboXS is a POS. I had one on my mr2 and thought it didn't leak. I pressure tested the system and found that it was leaking badly both from the ports and the mount. Unless you have a very big BOV, like the Tial, they're mostly noisemakers. The sard is pretty good, as is the HKS. There have probablly been more discussions/flame wars about BOV's on the mr2 board than any other subject. Get one that sounds the best to you as long as it isn't the turboXS.