Quote Originally Posted by ibsorgn View Post
In other words its for fuel economy - by preventing boost from building under lite loads.

I installed my SBV about a year ago and realized about a 2mpg increase in fuel economy. I purchased my SBV from Magnuson, I think I spent about $60 however ever due to hood clearance problems I mounted mine on the bottom side of the SC which was a challenge in itself.

Hope this answers your questions.
Are you satisfied with the way the SBV works? Any effect on performance? Could you be more specific about your comment "mounted mine on the bottom side of the SC which was a challenge in itself."
Many thanks