TiAL Sport 38mm Wastegate Valve Seat | Replacement Service Part for TiAL 38mm Wastegate (MVS / MV-S)

The TiAL Sport 38mm Valve Seat is a genuine TiAL Sport replacement valve seat for the TiAL 38mm wastegate — the seating surface that the wastegate's poppet valve closes against to seal the wastegate port. The valve seat is a serviceable wear component in the TiAL 38mm wastegate assembly — replacing a worn or damaged valve seat during a wastegate rebuild restores the wastegate's sealing performance and ensures correct boost control. TiAL Sport is the most respected wastegate and blow-off valve manufacturer in the performance turbocharger market — an American manufacturer whose wastegates are the reference standard for performance and competition turbocharger applications worldwide.

Key Features:

• Genuine TiAL Sport replacement part — OEM TiAL Sport valve seat — correct material specification and dimensional tolerances for the TiAL 38mm wastegate assembly
• 38mm application — correct for TiAL's 38mm wastegate — the MVS (Mild Steel) and MV-S (Stainless Steel) 38mm wastegate variants
• Valve seat function — the valve seat is the seating surface that the wastegate poppet valve closes against — a correctly seating valve seat is essential for a leak-free wastegate seal and accurate boost control
• Serviceable wear component — the valve seat can be replaced during a wastegate rebuild without replacing the entire wastegate body — a cost-effective service part for maintaining TiAL wastegate performance
• TiAL Sport quality — manufactured by TiAL Sport, the most respected wastegate manufacturer in the performance turbocharger market

Valve Seat — Function and Wear:

The wastegate poppet valve opens and closes against the valve seat to regulate exhaust gas bypass around the turbocharger turbine wheel — controlling boost pressure. Every time the wastegate opens and closes, the poppet valve contacts the valve seat. Over time and with high heat cycling, the valve seat surface can wear, pit, or develop deposits that prevent the poppet valve from sealing correctly. A worn valve seat results in boost leaks — the wastegate cannot fully close, allowing exhaust gas to bypass the turbine even when the wastegate should be closed. This causes boost pressure to be lower than the target setpoint and inconsistent boost control. Replacing the valve seat during a wastegate service restores the correct sealing surface for the poppet valve.

TiAL 38mm Wastegate — Platform Context:

The TiAL 38mm wastegate (MVS mild steel and MV-S stainless steel variants) is one of the most widely used external wastegates in the performance turbocharger market — found on a wide range of turbocharged performance builds across Japanese, European, and domestic platforms. The 38mm port size is correct for a wide range of turbocharger applications from street performance to time attack and circuit racing. TiAL's wastegates are known for their precise boost control, high-quality construction, and serviceability — genuine TiAL replacement parts like this valve seat allow the wastegate to be rebuilt and returned to factory specification rather than replaced.

Specifications:

• Brand: TiAL Sport
• Part Number: TLS000672
• Barcode: 000672
• Component: Valve seat
• Application: TiAL Sport 38mm wastegate — MVS / MV-S
• Weight: 0.07 lbs

Fitment Information:

• TiAL Sport MVS 38mm Wastegate (mild steel body)
• TiAL Sport MV-S 38mm Wastegate (stainless steel body)
• Note: Verify your specific TiAL wastegate model and generation before ordering — confirm that TLS000672 is the correct valve seat for your specific TiAL 38mm wastegate. TiAL Sport wastegate designs have evolved over time — verify the correct part number for your specific wastegate generation with TiAL's parts documentation or Straight Six Imports.

What's Included:

• 1x TiAL Sport 38mm wastegate valve seat (TLS000672)

Installation Notes:

• Wastegate rebuild and valve seat replacement should be performed by an experienced turbocharger or boost control specialist
• Inspect the poppet valve face for wear or damage when replacing the valve seat — a worn poppet valve face will prevent correct sealing even with a new valve seat
• Inspect all wastegate seals and diaphragm during valve seat replacement — replace any worn or damaged components for a complete wastegate rebuild
• Verify correct valve seat seating after installation — the seat must be correctly installed and the poppet valve must close and seal correctly before returning the wastegate to service

Why TiAL Sport?

TiAL Sport is the most respected wastegate and blow-off valve manufacturer in the performance turbocharger market — an American manufacturer whose wastegates are the reference standard for performance and competition turbocharger applications worldwide. TiAL's wastegates are designed for serviceability — genuine TiAL replacement parts allow the wastegate to be rebuilt and maintained rather than replaced, providing long-term value for performance builds where TiAL wastegates are a core component. For TiAL 38mm wastegate owners who need a genuine replacement valve seat for a wastegate rebuild or service, TLS000672 is the correct part.

Perfect For:

• TiAL Sport 38mm wastegate (MVS/MV-S) owners performing a wastegate rebuild or service who need a genuine TiAL replacement valve seat to restore correct poppet valve sealing and boost control performance
• Turbocharged performance builds where a TiAL 38mm wastegate is a core boost control component and genuine TiAL service parts are required for correct wastegate maintenance
• Boost control specialists and turbocharger builders who stock genuine TiAL Sport replacement parts for wastegate rebuild services

Note: Verify correct TiAL 38mm wastegate model and generation before ordering. Inspect poppet valve face when replacing seat. Replace all worn seals and diaphragm during rebuild. Verify correct seating after installation. Experienced specialist installation recommended.