• Granatelli 540244 44mm water-cooled diaphragm external wastegate
  • Granatelli 540244 44mm wastegate with water-cooled actuator for heat management
  • Granatelli 540244 compact 44mm wastegate for tighter engine bays
  • Granatelli 540244 external wastegate for consistent boost control
  • Granatelli 540244 44mm external turbo wastegate with V-band
  • Granatelli 540244 water-cooled wastegate for reliable boost control
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Granatelli Motor Sports

Granatelli 44mm Water-Cooled Diaphragm External Turbo Wastegate with V-Band – 540244

Granatelli 44mm Water-Cooled Diaphragm External Turbo Wastegate with V-Band – 540244

SKU:540244

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COMPACT TURBO BOOST CONTROL

YOU DON’T ALWAYS NEED THE BIGGEST WASTEGATE — YOU NEED THE RIGHT ONE.

The Granatelli 540244 44mm external wastegate delivers precise turbo boost control in a compact package designed for street, street/strip and custom turbocharger systems.

Its water-cooled diaphragm actuator provides a heat-management advantage for installations close to hot exhaust components while the 44mm valve keeps packaging manageable in tighter engine bays.

44MM
Compact Wastegate 		DIAPHRAGM
Actuation Style 		WATER-COOLED
Heat Management

Why Choose a 44mm External Wastegate?

A 44mm turbo wastegate offers a useful balance between exhaust bypass capacity and compact packaging. It is a strong choice for many single-turbo and twin-turbo street builds where a larger 50mm or 60mm gate may not be required.

Good For

✓ Street turbo builds • ✓ Street/strip applications • ✓ Tight turbo manifolds • ✓ Custom fabrication • ✓ External wastegate boost-control systems

Product Specifications

Part Number 540244
Product Type External Turbo Wastegate
Valve Size 44mm
Actuation Style Diaphragm
Cooling Water-Cooled
Mounting V-Band External Wastegate
Air Ports 2 Top / 2 Bottom
Water Fittings -4AN
Included V-Band Inlet / Outlet Flanges, Clamps & Five Springs (4.0, 4.5, 5.7, 6.5 & 12 PSI)
CHECK BEFORE ORDERING: Confirm that a 44mm wastegate provides enough exhaust bypass flow for your engine displacement, turbocharger size, manifold design and desired boost pressure.

Key Features

  • 44mm valve in a compact package for tighter engine bays
  • Water-cooled diaphragm actuator with -4AN water fittings for installs close to hot exhaust parts
  • 2 top and 2 bottom air ports for spring-only or boost-controller plumbing
  • Ships with V-band flanges, clamps and five boost springs (4.0–12 PSI)
  • Works for many single- and twin-turbo street builds

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.

What comes in the box?
The wastegate, V-band inlet and outlet flanges and clamps, and five boost springs rated at approximately 4.0, 4.5, 5.7, 6.5 and 12 PSI.

Is 44mm the right size for my build?
44mm suits many single- and twin-turbo street builds where a 50mm or 60mm gate isn't needed. Bigger turbos and high exhaust-flow engines may need a 50mm or 60mm. 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. The 540244 uses -4AN water fittings.

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.

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.