Description
The Forge Motorsport FMDVRAYV2 is the largest and highest flowing blow-off valve currently offered by Forge Motorsport. Featuring a massive 50mm (2-inch) billet aluminum piston, this valve is designed to handle extreme boost levels while maintaining rapid response and long-term reliability. It is ideal for custom turbo builds, high-powered race vehicles, and bespoke forced induction systems.
Building on the success of the original FMDVRAY, Version 2 introduces a range of engineering improvements to both internal and external components. These include a more refined housing, upgraded O-rings, and optimized internal tolerances. As a testament to its durability, this exact valve is used on Forge Motorsport’s in-house Mk1 race car.
Key Features:
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50mm (2-inch) billet aluminum piston design for maximum flow
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No diaphragm to fail – piston-based construction ensures durability
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Viton heat-stabilized O-rings withstand extreme temperatures and pressure
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Lubricated with high-temperature Mobil 1 grease for minimal wear
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Precision Eibach springs for consistent and responsive operation
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Rebuildable and fully serviceable in minutes
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Available in anodized black or purple finishes
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Ideal for custom installations using the included weld-on boss and V-band clamp
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Covered by Forge Motorsport’s limited lifetime warranty*
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Recommended service every 3 years or 20,000 miles
What’s Included:
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1 x FMDVRAYV2 50mm Blow Off Valve
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1 x Clamp-On Weld Boss
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1 x V-Band Clamp
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1 x Forge Motorsport Keyring
Note: Only one shim may be used during assembly. Refer to product documentation or imagery for proper installation between the piston and spring.
Compatibility:
This blow-off valve is universal and is designed for custom or fabricated turbo systems. Fitment will vary based on engine bay layout, charge pipe configuration, and available space. Welding is required for installation using the included boss.
Recommended for:
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High-boost turbocharged race cars
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Custom fabricated boost systems
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Applications requiring high-flow atmospheric pressure venting
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Turbo setups using large-frame or twin-scroll turbochargers
If you are unsure about compatibility or installation requirements, please contact us for guidance prior to ordering.
This valve combines race-proven reliability, ultra-high flow capacity, and superior build quality. Whether you're running a fully built race car or a high-performance street machine, the Forge Motorsport FMDVRAYV2 is the ultimate solution for reliable turbo pressure relief.
