New 38MM Wastegate External Turbo W/ TIAL V-Band Flange Spring MV-R 14PSI

38MM External Wastegate for TIAL MV-R V-Band

This 38MM external wastegate with a TIAL-style V-band flange and 14PSI spring controls boost by diverting excess exhaust gas away from the turbine, keeping turbo pressure steady on upgraded setups.

Overview

This 38MM external wastegate is built for turbo builds that need reliable boost control instead of an internal actuator. The V-band flange and 14PSI spring make it a direct fitment option for TIAL MV-R style installations, and the compact body suits crowded engine bays. It is aimed at tuners and fabricators assembling or refreshing an external wastegate setup.

Built For Performance

• 38MM valve size suited to medium and large turbochargers
• V-band flange design for a secure, clamp-style connection
• 14PSI spring rate preset for common boost targets
• External gate layout avoids boost creep on high-flow exhaust systems
• Compatible with TIAL MV-R style mounting and plumbing

Fits These Machines

• for TIAL MV-R style external wastegate installations
• Universal fitment on custom turbo manifold builds

On-The-Job Use

• Turbocharged street and track builds running external gate plumbing
• Custom manifold fabrication where boost control is dialed in by spring rate
• Replacement of a worn or seized external wastegate on an existing setup
• Upgraded turbo systems that outgrow the internal actuator

Specs At A Glance

Good To Know

Q: What spring rate does this wastegate come with? A: It ships with a 14PSI spring, so boost is regulated around that target unless the spring is swapped.

Q: Does this bolt directly to a TIAL MV-R manifold? A: It uses a TIAL-style V-band flange, so it fits manifolds set up for that MV-R pattern, though final fitment should be checked against your specific flange.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.