Granatelli 50mm Viper Series Adjustable Atmospheric Turbo Blow-Off Valve – 540198
Granatelli 50mm Viper Series Adjustable Atmospheric Turbo Blow-Off Valve – 540198
Granatelli Motor Sports
Part #
'540198
UPC #
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Product Description
Product Description
GRANATELLI VIPER SERIES
FAST PRESSURE RELEASE, ADJUSTABLE RESPONSE — AND YES, IT MAKES THE RIGHT NOISE.
The Granatelli 540198 Viper Series 50mm Blow-Off Valve is a high-flow vent-to-atmosphere turbo BOV designed for street, street/strip and race applications.
Its adjustable spring preload lets the valve response be tailored to the vacuum and boost characteristics of the specific turbo system, while the 50mm valve provides fast pressure relief when the throttle closes.
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50MM High-Flow BOV |
ADJUSTABLE Spring Preload |
ATMOSPHERIC Vent-to-Atmosphere |
What Makes the Viper Different?
The Viper combines a 50mm high-flow valve with externally adjustable spring preload. This allows the blow-off valve response to be fine-tuned to the engine’s vacuum characteristics and turbo boost setup rather than relying on one fixed calibration.
Is the Viper Right for Your Setup?
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GOOD FOR • Turbo street cars • High-boost builds • Drag and race cars • Adjustable BOV setups • Vent-to-atmosphere systems |
VERIFY FIRST • Atmospheric venting compatibility • BOV mounting flange • Vacuum reference source • Engine-management strategy • Available charge-pipe space |
Product Specifications
| Part Number | 540198 |
| Product Type | Turbo Blow-Off Valve |
| Valve Size | 50mm |
| Discharge Style | Vent-to-Atmosphere |
| Adjustment | Adjustable Spring Preload |
| Construction | Billet Aluminum |
| Fitment | Universal Custom Turbo Applications |
Key Features & Benefits
- Application-focused Granatelli Motor Sports design
- Built for dependable performance and service
- Designed for enthusiasts, professional installers, and performance builds
Fitment & Installation
Confirm the part number, vehicle or engine application, dimensions, and supporting components before installation. Modified vehicles may require additional clearance, fabrication, calibration, or related hardware depending on the combination.
Frequently Asked Questions
What does a blow-off valve do?
A blow-off valve releases excess charge pressure when the throttle closes, helping manage pressure in the intake tract.
Will this work on a modified vehicle?
Compatibility depends on the complete vehicle combination. Confirm the listed application and supporting components before installation.
Why Choose Granatelli Motor Sports?
Granatelli Motor Sports develops performance components for real-world street, street/strip, race, and custom applications, with an emphasis on practical performance, dependable construction, and integration into serious automotive builds.
