Tomei Race Spec +1mm Valve Set (04+ STI, 02-14 WRX)

  • Ocersized Valves - +1mm
  • Waisted Stem
  • Engine Specific Design
  • Heat Resistance & Durability
  • Intake Valves material: SUH35 Steel
  • Exhaust Valves material: Inconel 751
  • Standard Size Intake - 37mm / Exhaust - 33mm
  • Sold as Complete Set Intake & Valves
SKU
TA303A-SB01A
$456.00

OVERSIZED VALVES
The oversized head diameter is designed specifically for each application, significantly improving the flow rate.


WAISTED STEM

The waisted stem allows a greater volume of air/gases to enter and exit the combustion chamber as the valve extends. (not available on some models)


ENGINE SPECIFIC DESIGN
Each valve is designed and precision machined specifically for the intended engine/application.The head, face, stem and lock groove designs have also been optimized to enhance sealing performance, efficiency and durability.


HEAT RESISTANCE & DURABILITY
Intake: The intake valves are made using SUH35 HEAT RESISTANT STEEL which is more commonly used to make exhaust valves. These are then coated with a special formula that further improves the valves' resistance to heat, wear and corrosion.
Exhaust: In order to withstand temperatures of up to around 1000℃, the exhaust valves are made using a nickel based heat resistant alloy, INCONEL 751.

  • +1mm Size / Intake - 37mm / Exhaust - 33mm


Vehcile Fitment:

  • 2004+ STI
  • 2002-2014 WRX


warning_symbolWARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to https://www.P65Warnings.ca.gov/passenger-vehicle.

More Information
SKU TA303A-SB01A
Product Type Engine
Engine Cylinders and Valvetrain
Brand Tomei
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