Skip to content

Supertech Exhaust Valves Inconel +1mm Head Size/OEM Style Face – Ford/Mazda Duratec 2.0/2.3 inc. Mazdaspeed 3 2007-2013 | Mazdaspeed 6 2006-2007


Original price was: $223.95.Current price is: $179.20.

**NOTE: This valve will fit the Mazdaspeed 3 and Mazdaspeed 6 models ONLY when used with the upgraded Supertech valve guides and seals. If you are looking to replace the valves only and reuse the factory guides and seals, please search part number MAEVI-2301D-6mm (exhaust) and MAIVN-2301D-6mm (intake).

– +1mm Oversize Head
– Standard Length
– OEM Style Face
– Inconel

We apply more than 30 years of experience in the development of each and every Supertech racing valve we sell. Combine this experience with state of the art equipment such as ultrasonic tests, x-rays, laser measurement equipment, and applications like computerized Finite Element Analysis (FEA) and it is no wonder why supertech has some of the best performance products on the market.

While this is more than most manufacturers we don’t stop there. We also do extensive testing working very closely with many of today’s top engine builders in order to
continuously improve our products. All of this is meant to insure Supertech’s industry leading reputation for high flow rates, durability and uncompromising quality.

Higher Flow Rates
Our valves are not finished from generic blanks rather they are specifically designed for each and every application. We work relentlessly, testing and researching every aspect trying to improve the air flow of our designs.

With every valve design we strive to maximize durability through higher fatigue resistance and tensile strength. Each valve tip is hardened beyond 52HRc.

Stem Super finishing
In 2006 we introduced our stem Superfinishing as a standard addition to all of our valves and provided it at no additional cost. When our Superfinish is combined with our Black Nitrided valve it reduces the surface roughness to 1/3 of our chrome coated valve. The end result… unsurpassed performance and durability.

Strict Dimensional Tolerances
It’s unlikely you will find any of our competitor’s valves with stricter dimensional tolerances than our Supertech valves. Combine that with finished seats with equally strict run out tolerances and you won’t find a better sealing, better performing and easier to install solution anywhere!

Weight 5 lbs
Dimensions 6 × 6 × 6 in