The Enginetech EM4461 exhaust valve features a 1.181" head diameter, 0.2352" stem (6mm nominal), and 4.120" overall length with Inconel-faced severe-service construction and a nitride-hardened stem. Fits 2006-2013 Mazda 2.3L applications.
Important Notes
- Sold individually as a single valve. Order the quantity required for your engine configuration (typically one per cylinder per valve position).
- Nitride-hardened stem surface resists wear and galling in high-temperature and high-load applications.
- Inconel-faced construction provides high-temperature corrosion resistance and thermal fatigue strength, intended for diesel, heavy-duty, and high-load exhaust applications where standard alloys would fail prematurely.
- Always verify head diameter, stem diameter, overall valve length, and groove count against the OE valve being replaced before installation - valve dimensions vary across engine families and a visual match alone is not sufficient.
Specifications
| Part Number | EM4461 |
| Valve Type | Exhaust Valve |
| Head Diameter | 1.181" |
| Stem Diameter | 0.2352" (6mm nominal) |
| Valve Length | 4.120" OAL |
| Material | Inconel faced (severe-service) |
| Stem Finish | Nitrided Stem |
| Number of Grooves | 1 |
| Weight | 0.25 lbs |
| OEM Cross-Refs | Mazda: L3K912121C, Mazda: L3K912121D, SBI: 13306, Topline: EVMA25T |
Vehicle Fitment
2006-2013 Mazda 2.3L / 2261 DOHC L4 16V MZR-T Turbo 87.50mm Bore; 2007-2012 Mazda 2.3L / 2261 DOHC L4 16V MZR-T Turbo 87.50mm Bore.
Product Video
Watch the Enginetech exhaust valve overview: https://youtu.be/G487Dw8HtII
Watch the Enginetech exhaust valve overview: https://youtu.be/eLaQHop7rH8
Enginetech standard valves are stock-replacement engine valves produced from OE grade materials or better, engineered with the production engine rebuilder in mind. Face runout, stem finish, and stem diameter tolerances are held to some of the tightest standards in the internal engine parts industry, and every valve is inspected by on-site engineers against a documented quality plan before it leaves the plant. The line covers domestic, import, and common high-performance applications across a full range of head diameters, stem diameters, and overall lengths, with chrome-plated and nitride-hardened stem finishes available where the engine's operating conditions call for the upgrade. Always verify head diameter, stem diameter, valve length, groove count, and any oversize stem requirement against the original valve being replaced before installing, as multiple valve configurations can share the same vehicle nameplate.
WARNING: This product can expose you to chemicals including lead and nickel, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
