ok. my bov is just a cheap one. mite splash out on a blitz or hks ssqv aint sure. i have made the spring softer but the chatter seems quieter just goes on a bit longer? its better though. cars just a bit anoying though cuz everytime i ease off the throttle it dumps! i like the sound but can get a bit anoying after a while!lol! its smoking alot to? only since the decat though? and seems to be drinking fuel? i think thers summin wrong with it, or im just paranoid? gone a bit slugish or im just used to it?