I have a couple of the arresters of of hp500's if your interested.

1_bigdogg - the K&N is approved as an assembly. The number is stamped on their lid. The aircleaner comes as a kit with the lid, filter and base plate.

Blue - www.livorski.com

Hey Cord is that the address for the new branch they opened in Poland

I know of a guy with built ( stroked 454's) 496's that actually dyno'd better with the merc. arrestors.

That was good Scott, I just now got it.

I have to used Gaffrigs for $60 each! Hope this helps.