Granatelli Motor Sports Water Cooled Diaphragm Design 44MM Turbo Wastegate #540244

Granatelli Motor Sports Water-Cooled Diaphragm Wastegate – 44mm

SKU: 540244

Engineered for Maximum Stability, Cooler Operation, and Rock-Solid Boost Control

When you're pushing serious boost, heat becomes your biggest enemy. Granatelli’s water-cooled diaphragm wastegate eliminates that weakness by circulating coolant through the diaphragm housing, keeping temperatures stable and performance consistent. The result? Harder runs, tighter regulation, and a wastegate that doesn’t flinch when the heat is on.

Designed for drag racing, high-performance street use, and heavy-hitting diesel setups, this 44mm wastegate delivers the reliability and precision your build deserves.

Water-Cooled Diaphragm Advantage

Traditional wastegates struggle as temperatures climb. This water-cooled diaphragm system stays thermally stable under extreme exhaust heat, giving you:

• Consistent boost control on hot laps
• More accurate boost regulation
• Longer diaphragm life
• Reduced boost creep in high-heat environments

A black anodized billet aluminum cap and a natural-finish stainless steel base complete a design built to take abuse without missing a beat.

Straightforward Installation & Full Adjustability

Installation is simple with the included V-Band inlet and outlet flanges and clamps. The wastegate comes with two pre-installed springs—4.1 PSI and 4.7 PSI—giving you a ready-to-run baseline right out of the box.

The additional springs in the Five-Spring Kit include 3.1 PSI, 5.3 PSI, and 5.4 PSI options. Mix, match, and stack to achieve your exact boost pressure. No guesswork. No compromise.

Key Features

• True 44mm valve diameter for maximum exhaust flow
• Water-cooled diaphragm housing for unmatched thermal stability
• Precise, consistent boost control under extreme conditions
• Black anodized billet aluminum top cap for durability and a stealth finish
• Heavy-duty stainless steel base with natural finish
• Includes V-Band inlet/outlet flanges and clamps
• Five-spring kit included, with 4.1 PSI and 4.7 PSI pre-installed plus 3.1 PSI, 5.3 PSI, and 5.4 PSI springs for fine tuning

The Ultimate Boost Control Solution

If you demand power, predictability, and hardware that stays locked in under brutal heat, this is your wastegate. Built for racers, street warriors, and diesel brutes alike, Granatelli’s water-cooled diaphragm wastegate delivers when controlling boost isn’t optional—it’s mission-critical.