It catches excess oil blow by residue. I had mine in wrong at first. Got a CEL. It's fixed now, but if you get one don't get the braided lines. They're a bitch, and don't fit right.

Hey bro! What's been going on with your ride? I still couldn't decide on my stripes and audio. Only done a catch can lately.

Good luck today bro! Your car is legit. Can't wait to see pics with the grille installed.

Hey Gunny did u leave ur Heritage grill unpainted on ur car?