{"product_id":"bielas-zrp-para-bmw-3-0l-n52-tipo-i","title":"ZRP Connecting Rods for BMW 3.0L N52 I-type","description":"\u003cp\u003eZRP Black Nitrided Standard Intake Valves for Audi\/VW 1.8T 20V (Set of 12)\u003c\/p\u003e\n\n\u003cp\u003eZRP black nitrided standard intake valves are designed for Audi, Volkswagen, Škoda, and SEAT 1.8T 20V engines, offering excellent durability, precise valve control, and reliable performance in both road and racing applications. Made from high-quality single-piece forged stainless steel, these intake valves undergo a specialized black nitriding treatment to significantly enhance their wear and fatigue resistance.\u003c\/p\u003e\n\n\u003cp\u003eThe black nitriding process diffuses nitrogen into the valve's surface layer, creating a hard, low-friction surface that reduces friction between the stem and guide, and improves lubrication stability. Unlike localized chrome coatings, the entire valve, including the stem and head, receives the black nitriding treatment, ensuring uniform protection and a long service life.\u003c\/p\u003e\n\n\u003cp\u003eEach valve is precision-forged, CNC-machined, polished, and tip-hardened to achieve strict dimensional tolerances and maximum durability. This ensures consistent sealing, smooth operation at high RPMs, and reliable performance in both naturally aspirated and turbocharged engines.\u003c\/p\u003e\n\n\u003cp\u003eTechnical specifications\u003c\/p\u003e\n\n\u003cp\u003eBase material: High-quality stainless steel (EV8 \/ 21-4N)\u003c\/p\u003e\n\n\u003cp\u003eSurface hardness: Black nitrided layer with a hardness of up to approx. 800 HV\u003c\/p\u003e\n\n\u003cp\u003eManufacturing process: Precision forged, CNC machined, polished, and tip-hardened\u003c\/p\u003e\n\n\u003cp\u003eTreatment: Full black nitriding of the entire valve (stem and head)\u003c\/p\u003e\n\n\u003cp\u003eDimensional accuracy: Strict tolerances for stem concentricity, straightness, and sealing surface finish\u003c\/p\u003e\n\n\u003cp\u003eAdvantages\u003c\/p\u003e\n\n\u003cp\u003eReduced friction between stem and guide for less wear and increased stability at high RPMs\u003c\/p\u003e\n\n\u003cp\u003eSignificantly longer service life compared to untreated stainless steel valves\u003c\/p\u003e\n\n\u003cp\u003eReliable sealing in both naturally aspirated and turbocharged engines\u003c\/p\u003e\n\n\u003cp\u003eIdeal for high-performance vehicles for road use and competition applications where durability and consistency are critical\u003c\/p\u003e\n\n\u003cp\u003eAdditional information\u003c\/p\u003e\n\n\u003cp\u003eSet quantity: 12 valves\u003c\/p\u003e\n\n\u003cp\u003eMaterial: Black nitride\u003c\/p\u003e\n\n\u003cp\u003eValve size: 26.90 mm head \/ 5.96 mm stem \/ 105.10 mm length\u003c\/p\u003e\n\n\u003cp\u003eEngine compatibility: All Audi\/VW 1.8L 20V engines\u003c\/p\u003e\n\n\u003cp\u003eApplications: Audi 1.8T 20V (S3, A3, A4) Škoda 1.8T 20V (Octavia) SEAT 1.8T 20V (Leon) VW 1.8T 20V (Golf, Polo)\u003c\/p\u003e","brand":"ZRP","offers":[{"title":"Default Title","offer_id":56970475405652,"sku":"ZRP-R-BMW-020-I","price":981.96,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1027\/4701\/3460\/files\/R-BMW-020-I_72fdc571-2677-4321-8c19-c08a087a803b.jpg?v=1788691476","url":"https:\/\/www.thetunerlab.com\/en\/products\/bielas-zrp-para-bmw-3-0l-n52-tipo-i","provider":"Thetunerlab","version":"1.0","type":"link"}