{"product_id":"stainless-steel-black-nitride-intake-valves-oversize-0-5mm-for-a-mini-r53-1","title":"Stainless Steel Black Nitride Intake Valves - Oversize +0.5mm for a Mini R53","description":"\u003ch2\u003eSTAINLESS STEEL BLACK NITRIDE INTAKE VALVES for Mini R53\u003c\/h2\u003e\n\u003cp\u003eSupertech'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.\u003c\/p\u003e\n\u003cp\u003eEach 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.\u003c\/p\u003e\n\u003ch3\u003eKEY FEATURES\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEV8 \/ 21-4N stainless steel base material for high-temperature strength\u003c\/li\u003e\n\u003cli\u003eBlack Nitride surface treatment for reduced friction and wear resistance\u003c\/li\u003e\n\u003cli\u003ePrecision-ground 5.94mm stem and dished face for optimal sealing\u003c\/li\u003e\n\u003cli\u003eSwirl-polished underhead for improved intake flow\u003c\/li\u003e\n\u003cli\u003e30.70mm head diameter, compatible with standard valve guides and seats\u003c\/li\u003e\n\u003cli\u003eSingle Groove lock groove design for secure retention\u003c\/li\u003e\n\u003cli\u003eOversize +0.5mm valve diameter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAPPLICATIONS\u003c\/h3\u003e\n\u003cp\u003eIdeal 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.\u003c\/p\u003e","brand":"SPA PERFORMANCE","offers":[{"title":"Default Title","offer_id":48974397014248,"sku":"SPMCIVN-1005S-8","price":239.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2193\/9683\/files\/MCIVN-1005S-8.jpg?v=1788204477","url":"https:\/\/spaturbousa.com\/products\/stainless-steel-black-nitride-intake-valves-oversize-0-5mm-for-a-mini-r53-1","provider":"SPA TURBO USA","version":"1.0","type":"link"}