• racing performance diesel turbo systems 50mm piston wastegate combines
  • capacity V-band installation adjustable spring tuning durable mechanical package
  • Blow Off Valves Waste Gates Wastegates New Products Engine/Drivetrain 540203
  • gives turbo builders different approach external boost control high-temperature
  • uses mechanical piston actuation to regulate exhaust bypass flow
  • Includes multiple springs for adjustable boost levels
1 6
SALE

Granatelli Motor Sports

Granatelli 50mm Piston-Actuated External Turbo Wastegate with V-Band – 540203

Granatelli 50mm Piston-Actuated External Turbo Wastegate with V-Band – 540203

SKU:'540203

In Stock—More than 10 available

Ships Today If Ordered Before  3:30 PM PST
Starting at $22.25/mo withPrequalify Now
$267.08$281.14 You Save 5% ($14.06)
Free ShippingOver $100
MadeIn USA
90-DayWarranty
View full details

GRANATELLI PISTON SERIES

NO DIAPHRAGM. JUST A PISTON BUILT TO TAKE THE HEAT.

The Granatelli 540203 50mm external turbo wastegate uses a piston-actuated boost-control design instead of a traditional diaphragm.

Built for demanding street, drag racing and performance diesel turbo systems, this 50mm piston wastegate combines strong exhaust bypass capacity, V-band installation and adjustable spring tuning in a durable mechanical package.

50MM
External Wastegate 		PISTON
Actuation Style 		V-BAND
Inlet & Outlet

Why Piston Actuation?

Instead of using a flexible diaphragm, this piston wastegate uses mechanical piston actuation to regulate exhaust bypass flow. It gives turbo builders a different approach to external boost control for high-temperature and high-demand applications.

Good For

✓ High-heat turbo systems • ✓ Street/strip builds • ✓ Drag racing • ✓ Performance diesel applications • ✓ Builders specifically wanting piston-style boost control

Product Specifications

Part Number 540203
Product Type External Turbo Wastegate
Valve Size 50mm
Actuation Style PISTON-ACTUATED
Base Cast Stainless Steel
Top Cap Black Anodized Aluminum
Mounting V-Band
Included V-Band Flanges, Clamps & Five-Spring Tuning Kit
IMPORTANT: This is the PISTON-ACTUATED 50mm external wastegate. It is different from Granatelli’s water-cooled diaphragm-style 50mm wastegate.

Key Features & Benefits

  • Application-focused Granatelli Motor Sports design
  • Built for dependable performance and service
  • Designed for enthusiasts, professional installers, and performance builds

Fitment & Installation

Confirm the part number, vehicle or engine application, dimensions, and supporting components before installation. Modified vehicles may require additional clearance, fabrication, calibration, or related hardware depending on the combination.

Frequently Asked Questions

What does a wastegate do?
A wastegate regulates exhaust energy reaching the turbine to help control turbocharger boost pressure.

Will this work on a modified vehicle?
Compatibility depends on the complete vehicle combination. Confirm the listed application and supporting components before installation.

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.