Inconel Exhaust Valves - Oversize +1mm for a Mini R53 (only 6 pieces)
INCONEL BLACK NITRIDE EXHAUST VALVES for Mini R53 (only 6 pieces)
Supertech's Black Nitride exhaust valves for the Mini R53 are manufactured from an Inconel-Nimonic nickel 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 R53 builds.
KEY FEATURES
- Inconel-Nimonic superalloy base material for extreme-EGT strength
- Black Nitride surface treatment for reduced friction and wear resistance
- Precision-ground 5.92mm stem and flat face for optimal sealing
- Swirl-polished underhead for improved exhaust flow
- 24.20mm head diameter, compatible with standard valve guides and seats
- Single Groove lock groove design for secure retention
- Oversize +1.0mm valve diameter
APPLICATIONS
Ideal for naturally aspirated, turbocharged, and supercharged Mini R53 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