Quote Originally Posted by Hugh@EuropaParts View Post
On top of that you see tons of test pipes in the classifieds but you hardly ever see a HFC.
I would personally chalk this up to members runninga test pipe are more apt to upgrade their turbo system, requiring a different test pipe and freeing their stock fitment one for resale.

With that said, I'd stick with a HFC since you live in Cali. The mild gain of a test pipe over a HFC wouldn't be worth the work to replace it with a cat for inspections. Just me though