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XDR Off-Road Blow-Off/Diverter Valve 615904

XDR Off-Road Blow-Off/Diverter Valve 615904
XDR Off-Road Blow-Off/Diverter Valve 615904XDR Off-Road Blow-Off/Diverter Valve 615904XDR Off-Road Blow-Off/Diverter Valve 615904XDR Off-Road Blow-Off/Diverter Valve 615904
$128.99 ea
NEWARRIVING SOONEstimated Ship Date 01/12/2026 (If Ordered Today)28 Available from HOLLEY PERFORMANCE PRODUCTS as of 12/27/2025
Model: 4016667
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
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This new XDR Off-Road® "blow-off" valve kit is designed for all 2016-2021 Polaris RZR XP Turbo models. The factory internal diverter is known to warp and stick resulting in a loss of power. This kit replaces the factory diverter valve with an external blow-off valve which releases the excess boost pressure into the atmosphere creating that turbo swoosh sound that has become very popular in performance circles. The pressure release point is adjustable via a knob on the top so you can either extend the swoosh sound, or you can tune it to be a quick short burst of air. Not a fan of the swoosh sound, you can also install the blow-off valve to recirculate like the factory valve rather than blow off pressure into the atmosphere. The valve is constructed from CNC machined aluminum, then black anodized and features the XDR logo laser-etched on top of the valve. Also includes a pre-oiled serviceable Delta Force synthetic filter to prevent dirt, mud and debris from entering the pressure relief port. Includes all necessary hardware and detailed instructions for an easy at home installation. Be sure to check out our Delta Force Refresh Kit for maintaining optimum efficiency of the pressure relief filter.
Features:
  • Comes with Serviceable Delta Force Synthetic Filter
  • CNC Machined Aluminum Construction
  • Makes Turbo Boost Swoosh Sound
  • Adjustable Pressure Release Points
  • Lifetime Limited Warranty
Fits all 2016-2021 All Polaris RZR XP Turbo Models. Adjustable Pressure Release Point. Can be set-up as a blow-off valve or diverter valve.
Installation Notes:
Fits all 2016-2021 All Polaris RZR XP Turbo Models. Adjustable Pressure Release Point. Can be set-up as a blow-off valve or diverter valve.
About XDR

Industry leading companies, B&M Racing and Flowmaster have joined forces and are proud to introduce our new Powersports division: XDR – Xtreme Dirt Racing. All XDR performance products have been painstakingly designed for the ultimate in off-road performance. Developed to address specific weaknesses of the most popular side by sides, XDR products not only provide a performance advantage, but also eye-catching good looks that let people know you’re serious about the quality, strength, performance and reliability of your rig.

The initial release of XDR products have been specifically designed for the Can-Am Maverick X3, Polaris RZR and Yamaha YXZ1000R. Our new product line-up includes both “Forestry qualified” and “Competition only” slip-on exhaust systems, gated race shifters with lockout features, Delta Boost performance tuners, grab handles and more. We are fully committed to developing industry leading products which we feel are all necessary tools for providing the ultimate in performance for your side by side.

Downloads:

Download Name File Size
bm_warranty.pdf87.47KB
615904_instructions.pdf3.11MB

Videos:

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years
Polaris RZR PRO XP 4 Premium Base 2020 - 2021
Polaris RZR PRO XP 4 Ultimate Base 2020 - 2021
Polaris RZR PRO XP 4 Base 2020 - 2021
Polaris RZR PRO XP Premium Base 2020 - 2021
Polaris RZR PRO XP Sport Base 2021
Polaris RZR PRO XP Ultimate Base 2020 - 2021
Polaris RZR PRO XP Base 2020 - 2021
Polaris RZR Turbo S Lifted Lime LE Base 2021
Polaris RZR Turbo S Velocity Base 2021
Polaris RZR Turbo S4 Lifted Lime LE Base 2021
Polaris RZR Turbo S4 Velocity Base 2021
Polaris RZR Turbo S4 Base 2021
Polaris RZR Turbo S Base 2021
Polaris RZR XP 4 Turbo EPS DYNAMIX Edition Base 2018 - 2019
Polaris RZR XP 4 Turbo EPS Base 2016 - 2019
Polaris RZR XP 4 Turbo S Velocity Base 2020 - 2021
Polaris RZR XP 4 Turbo S Base 2019 - 2021
Polaris RZR XP 4 Turbo Base 2020 - 2021
Polaris RZR XP Turbo EPS Fox Edition Base 2018
Polaris RZR XP Turbo EPS Base 2016 - 2019
Polaris RZR XP Turbo S Velocity Base 2020
Polaris RZR XP Turbo S Base 2020 - 2021
Polaris RZR XP Turbo Base 2020 - 2021

Specifications:

Air Filter Element Color Red
Air Filter Element Material Synthetic Media
Air Filter Element Washable Yes
Air Filter End Cap Color/Finish Black
Air Filter Heat Shield Included No
Air Filter Inside Diameter (in) 1
Air Filter Oil Included Pre-Oiled
Air Filter Outlet Shape Circular
Air Filter Overall Length (in) 2.13
Air Filter Overall Width (in) 2
CARB EO No
Emission Code 4
Mounting Hardware Included Yes
Part Type Turbocharger Blow Off Valve
Product Type Blow Off Valve
Proposition 65 www.P65Warnings.ca.gov

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XDR Off-Road Blow-Off/Diverter Valve 615904: