Not to hi-jack the thread, but personally I would look for an HKS if you want what is best for performance. The build quality is very good, (is a pull type relieve valve instead of push, so it holds boost and doesn't leak), has "bling bling" value over the others, and makes a really nice sound when venting. It also holds more power than the other comparable BOVs. (GReddy Type S, BLitz Supersound, APexi, etc.) The GReddy Type R and HKS Racing don't count as they are made for cars that are pushing much higher power. If you are pushing upwards of 500+ horsepower, I would possibly look into the HKS Racing BOV (which can handle up to 800HP by itself). The HKS Super Sequential is rated at around 450-500HP I believe. Alot of people will use two Super Sequntials instead of the Racing BOV on their higher horsepower cars. PM me if you have any further questions.