Air/Oil Separator

This self-maintaining unit coalesces oil without using a mesh media, which can accumulate contaminants. By separating oil from the crankcase and head ventilation air, the GrimmSpeed AOS allows your engine to run more efficiently. Oil in the intake can lead to reduced fuel octane, increased chances of engine knock, worse emissions, and higher oil consumption, all of which this separator aims to mitigate. Constructed from fully machined billet aluminum with a durable black or red anodized finish, this Air/Oil Separator features user-replaceable O-ring seals and a maintenance-free design. It uniquely retains the OEM PCV Valve while performing its primary function. The product is noted to be compact and visually appealing under the hood. Installation may require specific attention to hose routing due to surrounding components like the AC line, and users may opt for worm-gear screw clamps for secure connections to the AOS body to prevent leaks. Some users have noted that installation instructions may need to be supplemented with online resources for specific model years.