The Verus Engineering Air Oil Separator keeps oil out of the ND Miata's intake system. Oil vapor in the intake charge reduces effective octane, which can lead to detonation, power loss, and carbon build-up on the intake valves. The AOS uses four 5-micron coalescent filters — one on each inlet and outlet — combined with internal baffling and stainless mesh for thorough separation of oil from crankcase air.
Each unit ships fully assembled and pressure tested, with an easy-to-use drain valve. An optional coolant kit is available for demanding driving environments, and the AOS is offered in three anodized colors.
Notes: installation requires removal of the sound tube, if equipped. Models without a sound tube require slightly different hose routing. Right-hand drive cars require slight modification of the mounting bracket for A/C line clearance. Anodized finishes can fade over time due to engine bay heat.
What's included:
- Assembled AOS (4 coalescent filters, internal baffling, stainless mesh, drain petcock)
- Bracket
- 3/8" rubber hose
- Stainless hose clamps (8)
- Hardware bag — all necessary parts for install
Features:
- Prevents oil from entering the intake system, reducing the likelihood of power loss, carbon build-up, or detonation
- Superior oil separation using 5-micron filters, baffling, and stainless mesh
- Optional cooling kit available
- Three anodized color options
Specifications:
- CNC machined from 6061-T6
- Mil-Spec O-ring bosses
- Anodized for corrosion resistance
- CNC laser engraved
- (4) 5-micron coalescent filters
- Baffles for further separation of oil particles
- Ultra-sonic cleaned stainless mesh as the third separation media
Install resources:
