42 Draft Designs Oil Catch Can 1/2" NPT is designed specifically for VW or Audi and takes the basic idea of an oil catch can to the next level. Every internal combustion engine has pressure and blow-by gases in the crankcase and valve cover. Some engines do a better job of separating the oil vapors before reaching the PCV (positive crankcase ventilation) vents than others. Most engines don’t, sending a nasty mix of oil vapor and waste gases out the PCV vent and into the intake system. These vapors smother important (and costly) sensors with oil and gunk. In extreme cases, this gunk can build up on the valves killing performance. On a micro level, oil vapors displace oxygen molecules altering air-fuel ratios and effectively lower the octane level of your fuel. The ultimate catch can accomplishes the fundamental job of an oil catch can without any additional thought or modification. Bead rolled inlet and outlet fittings allow connection of 3/4" tubing. Inside, four filter screens create a maze for the PCV gases to navigate allowing oil droplets to collect as lighter gasses pass. Gravity lends a hand, collecting the oil and gunk at the bottom of the can. A bottom drain allows the can to be drained at any time. Beyond the basics, our ultimate can offers an industrial look and features found nowhere else. A built-in dipstick, sealed with a viton o-ring, allows you to check the fluid level of your tank at any time. The 2-piece design of our oil catch can allows the inlet and outlet fittings to point in 6 different directions for installation in any engine bay. Our lid offers 6 mounting points, ready to accept a mounting bracket at any rotation of the catch can. Included with the ultimate can are two cnc machined mounting brackets. One bracket allows for the can to be bolted to a horizontal surface. The other allows for the can to be bolted to a vertical surface. Both brackets can be flipped, modified, or even bolted together if necessary. The 42 Draft Designs ultimate oil catch can be disassembled for simple cleaning. Throughout the life of the can, the filter media will never need to be replaced. Tubing can be removed and re-installed from our fittings without ever damaging them. The o-rings provided are designed to stand up to oil and heat and may never need replacement. The entire catch can is built with precision from heavy duty materials proven to stand the test of time.