I know this is a popular item, so I'm surprised there isn't a thread here about it. Well I'll make one. I love this little $90 valve. It gives the car that much sought-after blow off valve sound with little to no effort to install. I purchased mine from Modern Performance and let me say I love those guys. They ship fast and are right there if you have any questions. Two thumbs up for this product! Get it if you don't have one!