Raceworks Black Slimline Catch Can 1.6L - ALY-155BKRaceworks Black Slimline Catch Can 1. 6L. An oil catch can or breather tank is an essential step in removing PCV oil before it enters the combustion chamber, and must be baffled while providing unrestricted flow to maintain efficiency and prevent intake carbon build up. Raceworks Catch Cans have been crafted to meet the most extreme street and track conditions, and are robot welded from 5052 aluminium. A tapered banjo style drain plug is fitted to