Granatelli 50mm Wastegate Traditional Diaphragm Design - 540202

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

BOOST SETUP NOTE: Correct external wastegate sizing depends on turbocharger size, engine displacement, exhaust flow, manifold design and desired boost pressure.

• 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?

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.

What sets the boost level? The wastegate spring sets the mechanical base boost.

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.

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