Tomei 37.00mm Intake 33.00mm Exhaust +1mm Valves for Subaru STI EJ257 WRX EJ205 EJ255 TA303A-SB01A

Tomei intake and exhaust valves are high-flow, ultra durable, and heat resistant race spec valves that are designed to withstand high power applications.



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.


Intake Valves

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 Valves

In order to withstand temperatures of up to around 1000 Degrees Celsius, the exhaust valves are made using a nickel based heat resistant alloy, INCONEL 751.


Complete Intake & Exhaust Set

This is a complete intake and exhaust valve set.

Specs: Intake Valves Head Size: 37.00mm Valve Head Size: +1mm Intake Valves Stem Diameter: 5.96mm Valve Length: 104.35mm Exhaust Valves Head Size: 33.00mm Valve Head Size: +1mm Stem Diameter: 5.96mm Valve Length: 104.70mm