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 unwanted crankcase pressure beneath the pistons during the down stroke.

Basically, it frees up Horse Power that your engine never had the ability to utilize until installing this UPR Billet One-Way Crankcase Breather. Incorporating 4 internal baffles to control oil. Ideal for all street and race applications to handle engine blow-by and any boost levels.

It has the ability to relieve excessive crankcase pressure that would otherwise flood the crankcase and create a positive pressure condition. This condition affects performance in a very negative manner. The positive pressure fights the engine's pistons on the every down stroke, and even the best-flowing PCV system is not designed for the demand of many late model passenger cars and trucks, let alone all the high-performance applications that are being produced and modified on a daily basis.
So after trying many different crankcase ventilation systems, we thought it was time to offer a more comprehensive crankcase breather solution. This setup incorporates specifically designed staged baffles and rubber wall barriers that allow the best airflow and control oil from escaping or climbing the valve wall during operation. It was critical to keep the oil contained throughout the pressure release cycle or otherwise called WOT = Wide Open Throttle.


This system offers a TRUE solution to vehicles with MAF sensors and MAP sensors without allowing unmetered air to enter the crankcase and affect the tune. What the breather has really excelled at is the real world horsepower and efficiency gains the engine now benefits from by eliminating positive crankcase pressure. Whether the vehicle is normally aspirated, supercharged, turbocharged or nitrous equipped, it will benefit from being able to control the excessive cylinder pressure that creates blow-by in any engine.

Currently, the majority of the people running the UPR Crankcase Breathers have them in conjunction with a UPR Products Catch Can System to be sure they are controlling oil from getting through the PCV system and entering the intake tract. The benefits are 100% real, and the cost vs. results can’t be beaten.

Product Features

» 5 Minute Installation
» CNC Machined Billet Body
» Direct Replacement for Oil Fill Cap
» Releases unwanted crankcase pressure under Boost
» Check Ball prevents unmetered air from entering engine
» Select Engine Size Above

Installation

Installs in 5 minutes.