• Granatelli 540259 60mm water-cooled external wastegate for high-horsepower builds
  • Granatelli 540259 60mm water-cooled diaphragm external wastegate with V-band
  • Granatelli 540259 60mm wastegate for controlled boost and exhaust bypass
  • Granatelli 540259 external turbo wastegate
  • Granatelli 540259 wastegate with sizing and spring combination note
  • Granatelli 540259 wastegate diverting exhaust around the turbine to control boost
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Granatelli Motor Sports

Granatelli 60mm Water-Cooled Diaphragm External Turbo Wastegate with V-Band – 540259

Granatelli 60mm Water-Cooled Diaphragm External Turbo Wastegate with V-Band – 540259

SKU:540259

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GRANATELLI BOOST CONTROL

BIG TURBOS MOVE A LOT OF EXHAUST. THIS IS BUILT TO CONTROL IT.

The Granatelli 540259 60mm external wastegate is built for high-flow turbo systems that need serious exhaust bypass capacity and stable turbo boost control.

Its water-cooled diaphragm design helps manage actuator temperatures in demanding street, drag racing, high-horsepower and performance diesel applications while the large 60mm valve provides the flow capacity needed by serious turbocharger systems.

60MM
High-Flow Wastegate 		DIAPHRAGM
Actuation Style 		WATER-COOLED
Thermal Management

What This Wastegate Actually Does

An external turbo wastegate controls boost by diverting exhaust around the turbine once the desired boost pressure is reached. The 60mm valve provides substantial exhaust bypass capacity to help maintain controlled boost and reduce the potential for boost creep on properly designed turbo systems.

Is This the Right Wastegate for Your Build?

GOOD FOR
• Large turbo systems
• High-horsepower builds
• Drag racing applications
• High exhaust-flow engines
• Performance diesel turbo systems		 CHECK BEFORE ORDERING
• Required wastegate diameter
• Turbo manifold design
• Desired base boost pressure
• V-band mounting location
• Available engine-bay space

Product Specifications

Part Number 540259
Product Type External Turbo Wastegate
Valve Size 60mm
Actuation Style Diaphragm
Cooling Water-Cooled Diaphragm Housing
Top Cap Black Anodized Billet Aluminum
Base Stainless Steel
Connection V-Band Inlet & Outlet
Included V-Band Flanges, Clamps, Water Fittings & Multi-Spring Kit
BOOST CONTROL NOTE: Wastegate spring pressure establishes the mechanical base boost level. Confirm wastegate sizing, spring combination, turbocharger flow and manifold design before installation.

Key Features

  • 60mm valve for large turbos and high exhaust-flow engines
  • Water-cooled diaphragm housing helps manage actuator heat
  • Black anodized billet aluminum top cap and stainless-steel base
  • V-band inlet and outlet
  • Includes V-band flanges, clamps, water fittings 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 60mm the right size for my build?
60mm is meant for large turbos and high exhaust-flow engines, where a smaller gate may not bypass enough exhaust. Smaller turbo setups are often easier to package with a 44mm or 50mm gate. 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 540259 comes with V-band flanges, clamps, water fittings 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.