Thats cool, really blow off valves go around for like 40 bucks, I thought I was getting ripped at that much but I guess it was a good price, cool. Yea when I first got my car, I raced chuck that week and he beat me without first gear.
And I found out why it was louder I think, most bov come with a couple washers in them or some kind of adjust to tighten them up, I took all mine out and loosened the nut on the side. For some reason it runs a little faster, but creates that idle problem, but the little bit of extra power is worth it again.