Stainless Steel Black Nitride Intake Valves - Oversize +0.5mm for a Mini R53
STAINLESS STEEL BLACK NITRIDE INTAKE VALVES for Mini R53
Supertech's Black Nitride intake valves for the Mini R53 are manufactured from premium EV8 (21-4N) stainless steel and finished with a proprietary Black Nitride surface treatment. This coating provides superior hardness, reduced friction, and enhanced corrosion resistance compared to standard stainless 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
- EV8 / 21-4N stainless steel base material for high-temperature strength
- Black Nitride surface treatment for reduced friction and wear resistance
- Precision-ground 5.94mm stem and dished face for optimal sealing
- Swirl-polished underhead for improved intake flow
- 30.70mm head diameter, compatible with standard valve guides and seats
- Single Groove lock groove design for secure retention
- Oversize +0.5mm valve diameter
APPLICATIONS
Ideal for naturally aspirated, turbocharged, and supercharged Mini R53 builds where reliable high-RPM airflow is critical. The swirl-polished intake valve improves flow while the Black Nitride surface resists wear in demanding builds.