Air/Oil Separator Small Miata 90-05 w/o ABS

The MOROSO Air/Oil Separator Small Miata 90-05 w/o ABS is purpose-built for Mazda Miata enthusiasts who demand efficient crankcase ventilation during spirited driving. This aluminum separator eliminates oil carryover from the PCV system, protecting your engine while reducing carbon deposits in the intake manifold. Miata owners—whether tracking their vehicles or pushing limits on back roads—benefit from cleaner combustion and extended engine life that this precision component delivers.

Engineered with a compact 4.5-inch tall design and 2.125-inch diameter chamber, this separator uses gravity and centrifugal force to capture oil mist before it enters the intake tract. The polished aluminum construction provides both durability and a clean engine bay aesthetic, while the 3/8-inch NPT female inlet and outlet connections ensure straightforward plumbing integration into stock or modified PCV lines. The lightweight design (2.45 lbs) minimizes underhood weight penalty, crucial for 4-cylinder Miata performance tuning.

This kit is ideal for 1990–2005 Mazda Miata models without ABS, fitting naturally into the engine bay without modification to core components. Installation requires only basic hand tools and familiarity with hose routing. Serious Miata builders and daily drivers alike choose this separator to maintain valve cleanliness and reduce oil consumption, particularly when running higher boost or extended track sessions where standard ventilation falls short.