



This bundled pair delivers high-flow, zero-cracking-pressure performance for boosted PCV systems using both 14mm and 17mm hoses. Each billet valve improves airflow, prevents oil ingestion, and installs in minutes for a reliable, Plug-n-Play™ upgrade on turbocharged and Ecoboost setups.
Includes 14mm (½") and 17mm (5/8") Pro Series valves
Zero-cracking-pressure for instant airflow
Billet aluminum construction with corrosion-resistant internals
Ultra-Bite locking barbs for secure hose retention
Performs from –30° to 400°F
Plug-n-Play™ installation in about 5 minutes
Designed to enhance PCV efficiency and reduce oil ingestion
Vehicles using 14mm (½") PCV or catch-can hoses
Vehicles using 17mm (5/8") PCV or catch-can hoses
Turbocharged and supercharged applications
Ford Ecoboost engines and universal boosted setups
Physical products may be returned within 30 days for any reason, provided that the product has not been installed and is in brand new, unused condition with the original packaging. Once a product has been installed, it is non-refundable.
Digital Products, such as MPT Tunes and HP Tuners Credits, are not covered by this.
Please see our Refund Policy or contact an MPT Expert for more information.
MPT is proud to offer free shipping on most orders over $149.
Free Shipping applies only to the contiguous United States. Shipping and handling charges will apply to all orders outside the contiguous US, with the buyer being responsible for any duty fees or taxes their home country may charge to import goods.
With Free Shipping, we will choose the best shipping method for the order. We use all major carriers, including USPS, FedEx, UPS, and DHL.
Items not stocked at our location may incur additional lead-time or charges.
Please our Shipping Policy for more information.


Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986) is a California law that applies to all companies selling products in California. Proposition 65 requires warnings if a product contains any listed chemical present above very low levels that are known to cause cancer, birth defects or other reproductive harm. Proposition 65’s warning standards are among the most stringent in the world. Proposition 65 is not a product safety law, but rather a “right-to-know” law. Businesses are required to provide warnings to comply with Proposition 65. These warnings are required to be in place for all products offered for sale in California.
There are over 800 chemicals on the Proposition 65 list, which is administered by California's Office of Environmental Health Hazard Assessment (OEHHA), a part of the California Environmental Protection Agency. The list includes naturally occurring and man-made chemicals. Proposition 65 warnings can be seen for a wide variety of everyday consumer products, including Automotive Performance products, and warnings can be seen posted throughout California in a variety of establishments such as hotels, restaurants, automobile dealerships/repair shops, and retail stores just to name a few.
To comply with the requirements of Proposition 65, this warning is present on all products sold by MPT.
More detailed information can be found by going to:
https://www.p65warnings.ca.gov/
This UPR Billet Pro Series Check Valve Pair is a bundled, high-performance solution designed for enthusiasts seeking a complete PCV system upgrade using both 14mm (½") and 17mm (5/8") hose sizes. Engineered for boosted engines where proper one-way flow is critical, this two-piece set delivers a seamless combination of durability, flow efficiency, and Plug-n-Play™ convenience.
The first component in this bundle, the UPR Billet Pro Series Check Valve 5044-02, features a 14mm (½") connection ideal for smaller PCV or catch-can hose runs commonly found on Ecoboost and other turbocharged vehicles. It is specifically designed to eliminate oil ingestion caused by factory PCV shortcomings, using a zero-cracking-pressure internal design that allows immediate airflow without restriction. Its billet aluminum body, exclusive face-seal O-ring, and corrosion-resistant internal components ensure reliable operation from cold starts to high-temperature boost conditions.
Complementing it is the UPR Billet Pro Series Check Valve 5044-03, designed for larger 17mm (5/8") hose routing. This larger-diameter valve mirrors the performance and construction quality of the 5044-02, incorporating Ultra-Bite locking barbs, a corrosion-resistant polymer ball, and the same 0 PSI cracking pressure for maximized PCV efficiency. Together, these two valves provide complete coverage for dual-size PCV setups, custom catch-can systems, or builds requiring multiple hose diameters while maintaining flawless one-way flow control under vacuum or boost.
Complete 2-piece bundle including 14mm & 17mm high-flow check valves
Zero-cracking-pressure design for instant, unrestricted airflow
CNC-machined billet aluminum construction
Exclusive face-seal O-rings for leak-free performance
Ultra-Bite locking hose barbs for secure attachment under boost
Corrosion-resistant polymer ball internals
Operating range of 0–100 PSI
Temperature tolerance from –30° to 400°F
Plug-n-Play™ installation design
Prevents oil from being sucked into the intake during boost or vacuum
Improves PCV system efficiency on turbocharged and supercharged engines
Reduces carbon buildup and promotes cleaner combustion
Delivers a matched pair for complete system coverage
Quick 5-minute installation with basic hand tools
Backed by UPR’s Manufacturer Standard Warranty
Included Sizes:
5044-02: 14mm (½")
5044-03: 17mm (5/8")
Material: Billet aluminum body with polymer internal components
Color: Black anodized finish
Cracking Pressure: 0 PSI
Operating Pressure: 0–100 PSI
Temperature Range: –30° to 400°F
Connection: Ultra-Bite locking hose barbs
Installation is rated very easy. Each valve is Plug-n-Play™, requiring no modifications, and can typically be installed in about 5 minutes using simple hand tools.
Compatible with vehicles using 14mm (½") and 17mm (5/8") PCV or catch-can lines, including turbocharged, supercharged, and Ecoboost applications. Fitment is determined by hose size rather than specific model, providing broad compatibility across many boosted engine platforms.
CARB Status
This product is NOT CARB-APPROVED. We cannot ship this item to CA or any Carb regulated states. To avoid cancellation fee, do not order this if you live in California.
If you have any questions about this product or need to report product description inaccuracies, contact the MPT Performance experts at (407) 636-7077 or by email.
MPT is proud to offer free shipping on most orders over $149.
Turnaround Times:
Special Considerations:
A Return Authorization Number is required for all returns. Please contact an MPT Expert to obtain an RA # before sending anything back to us for any reason.
MPT tuning charges and license fees are Non-Refundable. The sale is final when MPT has sent the tune file over email. This includes both new tune purchases and tune updates.
Products other than MPT tunes, digital products, and MPT decals may be returned within 30 days for any reason, provided that the product has not been installed and is in brand new, unused condition with the original packaging. Once a product has been installed it is non-refundable. We reserve the right to deny the return, should the product be received and it display signs of installation or unmentioned damage.
For vehicle programmers/tuners, the vehicle must be returned to stock if a program was installed. If a tuning device is returned and has not been returned to stock, a refund will not be issued, and your tuner will not be sent back without a shipping and handling fee.
The customer is responsible for all shipping charges incurred during the return process.
Amount Refunded:
•Returns post marked before 30 days from the date the item was received will be refunded the purchase price, minus a 25% restocking fee and the cost of shipping.
•After 30 days, all sales are Final.
•Shipping charges along with any package insurance are non-refundable. If your purchase was shipped with our Free Shipping option, the cost of the shipping will be subtracted from the total refund amount.
HP Tuners Credits are assigned to the HP Tuners product with the submitted serial number and cannot be transferred. Once you load a tune to your vehicle with the RTD, these credits are Non-Refundable.
Digital products and files that have no ability to be taken back physically, such as an SCT Tuner Unlock, are Non-Refundable.
nGauge Tune License Fee is included in your initial purchase of MPT tunes for the nGauge. This fee is factored into the price of the tunes and becomes Non-Refundable when the stock file has been emailed to MPT.
MPT Decals are Non-Refundable, once they have been received by the customer.
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