When I bought my Laser it came with a TurboXS Type H bov. It help and sounded fine, didn't leak. Then I took my car to the track. I was running 18psi to start with and by the end of the day I noticed I was only running 16.5psi. I did a boost leak test and found the bov to be leaking at 12psi. It was leaking around the brass diapragm and coming out the holes where it normally would when it blows off. Well my roommate happened to have a brand new TurboXS Type H bov that he said I could use. We put it on and did another boost leak test. This one started leaking at 16psi BRAND NEW. I had no other choice so I used it. It's been on there about a month and I did a boost leak test today for the hell of it. It now leaks at 11psi! I highly recommend NOT using TurboXS bran bov's. I'll be going with a stock 1g bov I got today for free.