The 20-0267-FL PCV Catch Can Kit is used for the Mustang GT in both the S197 and the S550 chassis. It mounts on the front right engine bank.

This catch can runs inline with the PCV (positive crankcase ventilation) valve and retains it's factory function. When the intake manifold pressure is close to or greater than atmospheric pressure, the PCV "check" valve closes and, thus, this hose experiences no flow. Conversely, the PCV hose will experience "metered" vacuum when the engine is idling, steady state cruising, and decelerating. This would normally draw unwanted crankcase vapor, unspent fuel, and oil sludge into the intake manifold immediately after a high load run. Note: Because the Radium catch cans are pressure sealed, they are great for boosted applications as well so intake manifold connection is permitted. The kit installs in minutes and is easily removed for servicing.

The Crankcase Vent (CCV) Catch Can Kits (11-14 = 20-0279-FL, 15-17 = 20-0287-FL) mount on the front left engine bank of the Mustang GT, as shown below. This catch can runs inline with the crankcase breather port. At low loads it experiences atmospheric pressure, but when the engine is at high load (WOT), this hose will experience high flow out of the crankcase. This would normally lead to oil and sludge accumulation in the air filter intake pipe. If the engine is turbocharged or supercharged oil accumulation can occur in the intercooler which can lower the thermal efficiency properties of the heat exchanger and lead to decreased performance.

Each kit includes the following: 

-Anodized oil catch can with integrated condenser and dipstick
-Anodized laser cut Mustang GT specific mounting bracket
-Anodized aluminum -8AN adapter fittings and hose ends
-Enough 1/2" PCV hose for custom applications  
-Stainless steel mounting hardware