1999-2004 Mustang oil separators are among the best investments you can make to keep your Fox-4 fourth generation Mustang's engine working the way it should, feeding you the power you need and continuing to work for a long time to come. These modern separators fix a problem in the stock PCV air system that no stock part handles.
Modern Mustang oil separators for 1999-2004 models are engineered with precision and scientific knowledge that wasn't available just 10 years ago. These parts are made out of tough premium materials – billet aluminum, which stands up to stresses and resists all kinds of corrosion, while remaining extremely lightweight. They're topped with an anodized finish, which may be clear to let the gleam of aluminum show, or gloss black to give a stealthy look to your engine compartment.
Of course, they aren't just another pretty component, and add an important function to your 'Stang's air circulation system. Using top-quality fittings, they plug inline into the PCV line, capturing oil vapors from the air pumped out of the crankcase as exhaust. These oil vapors are collected as sludge in the lower aluminum tank, from which you can safely remove the residue.
Without these 1999-2004 Mustang oil separators, the crankcase exhaust is sucked right back in to the intake. All the oil vapor condenses out into damaging, choking gunk on the inside of the air system, which can lessen your Pony's responsiveness, cut engine power, and reduce the lifespan of critical engine parts. Adding an oil separator neatly removes all of these problems.
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