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Blow-Off Valves

Utilizing advanced Aerospace technology, Garrett performance external wastegates offer superior reliability and control over your engine’s exhaust gasses. The GVW product line is engineered and manufactured by Garrett Advancing Motion.

Garrett GVB Blow-Off Valves:


  • Recirculating and Vent to atmosphere housing options
  • CFD tested for maximum flow and thermal efficiency
  • Replaceable components to increase service life
  • Robust design for easy diaphragm replacement
  • 6061 Anodized aluminum actuator cover and fully-machined billet housing
  • Maximum flow 350 CFM | .21kg/s for GVB-50R (Recirculating)
  • Four outlet adapters for the recirculating valve. Adapters sold separately
  • Four Colors: Red | Blue | Black | Silver
  • Base pressure 0.7 Bar | 10 PSI (blue and white spring installed)
  • Springs | Fittings | Flanges | V-Bands included
  • Configurable springs settings include: 3 | 4 | 6 | 7 | 9 | 10 | 12 | 13 PSI
  • Wrought Aluminum Alloy Weld Flange
  • 17/7 PH Stainless Steel Springs (2 installed, 3 additional)
  • Plated stem and bushing for lowered friction and wear resistance
  • High temp nomex reinforced diaphragm
  • Stainless steel fittings and fasteners

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Part Numbers

Garrett GVB-50 Blow-Off Valves: Part Numbers and Configurations


Model Part Number Base Pressure Color Description Spring Chart Install Guide
GVB-50A 914956-0001 10PSI Red Vent to atmosphere Download Download
GVB-50A 914956-0002 10PSI Blue Vent to atmosphere Download Download
GVB-50A 914956-0003 10PSI Black Vent to atmosphere Download Download
GVB-50A 914956-0004 10PSI Silver Vent to atmosphere Download Download
GVB-50R 914959-0001 10PSI Red Recirculating housing Download Download
GVB-50R 914959-0002 10PSI Blue Recirculating housing Download Download
GVB-50R 914959-0003 10PSI Black Recirculating housing Download Download
GVB-50R 914959-0004 10PSI Silver Recirculating housing Download Download
GVB-50R 913283-0001 Recirculating housing outlet adapter 1.00″ | 25.4mm Download Download
GVB-50R 913283-0002 Recirculating housing outlet adapter 1.14″ | 29mm Download Download
GVB-50R 913283-0003 Recirculating housing outlet adapter 1.34″ | 34mm Download Download
GVB-50R 913283-0004 Recirculating housing outlet adapter 1.50″ | 38.1mm Download Download


Material Data

  • Valve Housing: Fully-machined billet
  • Diaphragm: High temp Nomex reinforced elastomer
  • Actuator Cover: Fully-machined anodized 6061 aluminum
  • Valve Bushing: Hard-anodized wrought aluminum alloy
  • Valve: high temp stainless steel with plated stem
  • V-Band: CNC machined 304 stainless steel
  • Flanges: Fully-machined 304 stainless steel
  • Springs: 17/7 PH stainless steel


4 Color Options

GVB-50 Blow-Off Valves are available in four colors


  • Colors: Red | Black | Blue | Silver

Kit Contents

GVB-50 Blow-Off Valves include all the following parts:

  • Springs (Installed: blue, white, Spare: red, green, brown)
  • V-Band Assembly: (V-Band, bolt, nut)
  • Inlet Flange and O-Ring
  • Air Fitting Hardware (nuts, bolts, washers, banjo fitting)

Blow-Off Valves Springs

GVB-50 blow-off valves are set to .7 Bar | 10 PSI of base pressure and can be configured from 0.2 Bar | 3 PSI – .9 Bar | 13 PSI

Use the chart to reference spring color and identify Garrett GVB blow-off valve spring pressures


Garrett GVB-50 Blow-Off Valve Flange Specs

Garrett GVB-50 BOV flange dimensions are interchangeable with Tial Q and QR


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