Granatelli Motor Sports 540-202 50mm Water-Cooled External Wastegate Traditional Diaphragm Design

The Granatelli Motor Sports 540-202 is a 50mm water-cooled external turbo wastegate built for high-demand turbocharged applications. Using a traditional diaphragm design enhanced with an integrated water-cooling circuit, this wastegate circulates coolant through the diaphragm housing to maintain stable operating temperatures and deliver consistent boost regulation even under extreme exhaust heat loads.

Constructed with a black anodized billet aluminum top cap and a natural-finish stainless steel base, the 540-202 is engineered to resist corrosion and withstand the punishment of drag racing, high-performance street builds, and heavy-duty diesel setups.

Key Features:

• 50mm valve diameter for high-flow boost relief
• Water-cooled diaphragm design for superior thermal stability
• Black anodized billet aluminum cap with stainless steel base
• V-Band inlet and outlet flanges and clamps included for straightforward installation
• Five-spring kit included — 4 PSI and 5.7 PSI springs pre-installed at the factory
• Additional springs included: 4.5 PSI (Red), 6.5 PSI (Green), and 12 PSI (Yellow/Orange)
• Springs can be combined and stacked to achieve target boost pressure
• Water line fittings included
• Maximum actuation pressure: 14 PSI
• Sold individually

The included five-spring kit allows precise boost tuning right out of the box. Springs can be mixed and matched to dial in the exact boost pressure your application requires — no additional hardware needed to get started.