TiAL 003993 MV-S 38mm External Wastegate with V-Band Flanges and All Springs

The TiAL MV-S 38mm External Wastegate is a precision-engineered boost control solution built for high-performance turbocharged applications. At just 3.7 inches tall, it is one of the most compact external wastegates available, making it ideal for tight engine bays and twin-scroll dual-wastegate setups where space is at a premium.

V-Band inlet and outlet connections simplify installation significantly, and the kit includes both inlet and outlet mating flanges and CNC-machined stainless steel clamps. The three lower and two upper air ports allow easy connection to boost controllers and pressure sources from any angle—no need to rotate the actuator top. Unused ports are sealed with the included plugs.

Key Features:

• Ultra-compact design — stands only 3.7" tall, ideal for space-restricted and dual-wastegate builds
• High-temp NiCrFe alloy valve and 347SS valve housing for superior corrosion, wear, and galling resistance
• High-temperature silicone Nomex reinforced actuator diaphragm
• 17-7 PH Stainless Steel actuator springs maintain consistent pressure up to 900°F (483°C) without relaxing
• Nitronic 60 Stainless Steel valve seat and valve bushing
• All stainless steel hardware; mating weld flanges are 304L SS with chamfered, counterbored edges for easier welding
• CNC-machined billet aluminum actuator housing with color anodizing
• Integrated -4 AN water cooling ports to manage actuator temperatures in extreme conditions such as road racing — removable if not needed
• Supports boost pressures from 4.35 psi (0.3 bar) up to 24.66 psi (1.7 bar) with included spring set

What's Included:

• 1x MVS Wastegate Assembly
• 1x MVS Valve Seat
• 2x TiAL -4AN Removable Water Fittings
• 1x Inlet Flange & Clamp
• 1x Outlet Flange & Clamp
• 2x TiAL Air Fittings
• 3x Plugs for Unused Air Ports
• 6x Actuator Springs (full spring set)

The TiAL MV-S is manufactured in the USA and engineered to deliver reliable, precise boost control with minimal footprint — making it a go-to external wastegate for performance builds demanding both quality and compact packaging.