A factory PCV system routes crankcase vapor and the oil mist that rides along with it straight back into the intake, where it coats the tract and the back of the valves and lowers the effective octane of the charge. Plumbing this separator into the PCV line traps that oil and moisture in a polished aluminum body instead, and the elbowed bottom drain lets you empty it without pulling the can off the car.

Moroso 85474 Large Body Air-Oil Separator Features:

• Plumbs inline with the PCV system to capture crankcase vapor and residual oil mist.
• Large round aluminum body, 4.500 in. tall.
• Particularly useful with ethanol-blended fuels, which put more moisture into the crankcase.
• Includes 3/8 in. 90 degree inlet and outlet fittings.
• Includes 36 in. of 3/8 in. rubber hose.
• Bottom drain with an elbow for mess-free draining.
• Billet aluminum mounting clamp included.
• Polished finish.

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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