Sodium Filled Inconel Exhaust Valves for a Mini R56 N18 JCW
SODIUM-FILLED INCONEL BLACK NITRIDE EXHAUST VALVES for Mini R56 N18 JCW
Supertech's Black Nitride exhaust valves for the Mini R56 N18 JCW are manufactured from a sodium-filled Inconel-Nimonic superalloy and finished with a proprietary Black Nitride surface treatment. This coating provides superior hardness, reduced friction, and enhanced corrosion resistance compared to standard standard valves.
Each valve is precision-machined to OEM tolerances and undergoes rigorous quality control including dimensional inspection, hardness testing, and surface finish verification. The result is a valve that delivers consistent, reliable performance in both street and competition Mini R56 N18 JCW builds.
KEY FEATURES
- Sodium-filled Inconel-Nimonic superalloy for extreme exhaust-gas temperatures
- Black Nitride surface treatment for reduced friction and wear resistance
- Precision-ground 4.95mm stem and dished face for optimal sealing
- Swirl-polished underhead for improved exhaust flow
- 26.2mm head diameter, compatible with standard valve guides and seats
- Single Groove lock groove design for secure retention
- Available in standard and oversize diameters
APPLICATIONS
Ideal for naturally aspirated, turbocharged, and supercharged Mini R56 N18 JCW builds where exhaust valve durability is critical. The Black Nitride coating excels in high-EGT environments and is particularly well-suited for engines running lean air-fuel ratios or aggressive ignition timing.