• Granatelli 540202 50mm water-cooled external turbo wastegate
  • Granatelli 540202 50mm water-cooled diaphragm external wastegate with V-band
  • Granatelli 540202 50mm wastegate valve for increased exhaust bypass flow
  • Granatelli 540202 wastegate with stainless steel base and V-band mounting
  • Granatelli 540202 external turbo wastegate with black billet top cap
  • Granatelli 540202 wastegate with water-cooled diaphragm housing
  • Granatelli 540202 wastegate with external wastegate sizing note
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Granatelli Motor Sports

Granatelli 50mm Water-Cooled Diaphragm External Turbo Wastegate with V-Band – 540202

Granatelli 50mm Water-Cooled Diaphragm External Turbo Wastegate with V-Band – 540202

SKU:540202

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BALANCED HIGH-FLOW BOOST CONTROL

50MM IS WHERE FLOW CAPACITY AND PACKAGING MEET IN THE MIDDLE.

The Granatelli 540202 50mm external turbo wastegate is designed for performance turbo systems that need more exhaust bypass capacity than a compact 44mm gate without moving all the way to a large 60mm wastegate.

Its water-cooled diaphragm design, stainless-steel base and V-band mounting make it a strong choice for high-temperature street, street/strip and racing turbocharger applications.

50MM
High-Flow Valve 		DIAPHRAGM
Actuation Style 		WATER-COOLED
Thermal Control

What Makes This 50mm Wastegate Different?

The 50mm valve offers increased exhaust bypass flow for controlling boost on larger turbocharger combinations, while the water-cooled diaphragm housing helps manage heat around the actuator during demanding operation.

Good Choice For

✓ Performance turbo systems • ✓ Street/strip builds • ✓ Racing applications • ✓ Higher exhaust-flow combinations • ✓ V-band turbo manifolds

Product Specifications

Part Number 540202
Product Type External Turbo Wastegate
Valve Size 50mm
Actuation Diaphragm
Cooling Water-Cooled Housing
Top Cap Black Anodized Billet Aluminum
Base Stainless Steel
Included V-Band Flanges, Clamps & Multi-Spring Kit
BOOST SETUP NOTE: Correct external wastegate sizing depends on turbocharger size, engine displacement, exhaust flow, manifold design and desired boost pressure.

Key Features

  • 50mm valve: more bypass flow than a 44mm gate without moving to a 60mm
  • Water-cooled diaphragm housing helps manage actuator heat
  • Black anodized billet aluminum top cap and stainless-steel base
  • V-band mounting
  • Includes V-band flanges, clamps and a multi-spring kit

Before You Order

Wastegate size depends on turbo size, engine displacement, exhaust flow, manifold design and target boost. Not sure between 44, 50 and 60mm? Read our wastegate sizing guide, pick your spring setup with the Wastegate Boost Spring & PSI Guide, or compare every size in External Turbo Wastegates.

Frequently Asked Questions

What does an external wastegate do?
It routes exhaust around the turbine once your target boost is reached, which keeps boost pressure under control.

Is 50mm the right size for my build?
50mm sits in the middle: more exhaust bypass than a compact 44mm gate, in a smaller package than a 60mm. The right size depends on your turbo, displacement and target boost. Our 44mm vs. 50mm vs. 60mm wastegate guide walks through the choice.

What sets the boost level?
The wastegate spring sets the mechanical base boost. See the Spring & PSI Guide to choose a spring combination.

Why water-cooled?
Water cooling helps manage diaphragm and actuator temperature when the gate sits close to hot exhaust parts.

Do I still need a blow-off valve?
On most turbo builds, yes. The wastegate controls boost on the exhaust side; a blow-off valve releases intake pressure when the throttle closes. Read Wastegate vs. Blow-Off Valve or shop Granatelli 50mm & 64mm blow-off valves.

What's included?
The 540202 comes with V-band flanges, clamps and a multi-spring kit.

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.