Originally Posted by Jbook
I have the Active Autowerke x-pipe with HFC and I'm about to add the ESS 625 kit. I had the catless AA x-pipe first and it smelled horribly and sounded a bit raspy, but some people enjoy both of those attributes. Only other x-pipes I really considered were Dinan and Akra.
Absolutely LOVE my setup like this. Turns heads and brings compliments daily!