Seller notes

UPR Billet One-Way Valve Cover Crankcase Breather Kit - Free up Horsepower!! - Eliminate Crankcase Pressure!! Brand new UPR Billet One-Way Crankcase Breather Kit. This is a direct replacement for the factory oil fill cap that vents unwanted crankcase pressure to the atmosphere and improving overall performance. Incorporating a High-Performance check ball keeping unmetered air from entering the crankcase. The main benefit is that it drives just like stock until you get into BOOST and it releases ...

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