Garrett 45mm External Wastegate [GVW-45]

Controlling boost with industry leader Garrett. 



SKU GRT.908828-0001 Category Brand:

California Residents: Prop 65 Warning

Additional information

Weight N/A
Dimensions N/A

Black, Silver, Red, Blue

CARB And / Or EPA Compliance Testing Not Completed

While we believe this product is either CARB EO exemption applicable, or complies with the EPA's Anti-Tampering Policy, we have not completed the required testing and administrative process at this time. This product is not available to purchase for emissions-controlled vehicles located within the state of California, or available to ship to California addresses, without a completed AMS Race Waiver form. International users outside of the United States should act in accordance with their local laws and regulations.

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With 23 years of documented research and development in the forced induction field, AMS Performance has proven itself as the powerhouse in the automotive aftermarket. Our award winning performance systems are what all others are measured by.

Garrett Vent | External Wastegates regulate turbocharger shaft speed by venting exhaust gas around the turbine stage of the turbocharger. CFD optimized design maximizes flow and delivers optimum boost control. Advanced thermal optimization increases durability of the diaphragm. The cap design makes spring changes and serviceability of the entire GVW lineup easier and more reliable to perform.

  • CFD tested for maximum flow and thermal efficiency
  • Optimized actuation stability and temperature resistance for superior durability
  • Replaceable valve and bushing components to increase service life
  • Robust design for easy diaphragm replacement
  • Liquid-cooled actuator ports for use on severe applications (up to 52% reduction in body temp)
  • Anodized aluminum actuator cover
  • Four Colors: Red | Blue | Black | Silver
  • Valve Size: 45mm
  • Springs | Fittings | Flanges | V-bands included
  • Standard Base Pressure: 1 Bar | 14.5 PSI
  • Maximum Base Pressure: GVW45 & GVW50: 23 PSI | 1.6 Bar
  • Minimum Base Pressure: 3 PSI | 0.2 Bar


Flow Data

Garrett engineers created GVW as a high flowing product with low degradation in performance over its lifespan. Here’s how the three GVW wastegate sizes flow in LBS/MIN and KG/SEC at various increments of the valve stroke.

Changing Wastegate Springs

Wastegate springs are under pressure and can cause bodily harm if improperly installed. Please wear eye protection. If you have any doubts as to your ability to install this product, consult a local automotive repair company.

Remove the wastegate from the manifold. Place wastegate into an arbor press and depress the ram so it creates downward pressure on the top banjo fitting. The ram should be centered over the banjo. Remove the (6) 3mm hex-head screws in the top cap while maintaining pressure on the ram as to keep the cap from lifting off the body.

Once all 6 screws are removed, slowly raise the ram on the arbor press to release the pressure on the springs. Using the spring chart below, identify the appropriate springs you wish to install. GVW wastegates are assembled to 1 Bar | 14.5 PSI.

The springs must sit properly in the grooves to align the diaphragm assembly and actuator cover. Improper placement of the springs may result in failure of the wastegate. Set replacement springs in the diaphragm assembly grooves. Place top cap on and align the longest spring with the appropriate groove in the cap.

Place the wastegate in the arbor press and center it under the ram. Lower the ram slowly until the top cap touches the actuator body. Align the holes in the top cap with the threaded holes on the bottom cap, then install the (6) 3mm hex-head crews. Once all (6) screws are tight, raise the ram, remove the wastegate and torque the hex-head screws to 2.5Nm | 2.0 ft-lb.


Model Red Blue Black Silver Base Pressure Spring Chart Install Guide
GVW-40 908827-0001 908827-0002 908827-0003 908827-0004 1 Bar | 14.5 PSI Download Download
GVW-45 908828-0001 908828-0002 908828-0003 908828-0004 1 Bar | 14.5 PSI Download Download
GVW-50 908829-0001 908829-0002 908829-0003 908829-0004 1 Bar | 14.5 PSI Download Download

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