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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.
This frees up horse power that your engine never had the ability to utilise before. This kit incorporates four 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 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. 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 naturally 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.
Many parts are held in stock, or available to order for delivery in 10-14 days, subject to availability from our suppliers.
Orders placed before 1pm Monday - Friday may be despatched the same day, provided ALL items in your order are in-stock (exceptions apply).
For orders under £150 or to non-UK destinations, shipping charges are applied at Checkout.
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IMPORTANT – Orders delivered outside the UK will usually be subject to additional Local Customs and Import Duties. Such charges are the responsibility of the recipient and vary from country to country. Contact your local customs office for more details.
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