{"product_id":"ferrea-15-24-bmw-s58-single-spring-kit","title":"Ferrea 15-24 BMW S58 Single Spring Kit","description":"\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e KT4059 \u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eFerrea 2020-2024 BMW S58 Single Spring Kit KT4059\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe Ferrea KT4059 Single Spring Kit delivers reliable valvetrain control for BMW S58 engines found in M3, M4, X3 M, X4 M and M2 models. This complete kit with 24 springs and titanium retainers supports high boost and revs past 9,000 RPM without valve float. It maintains precise valve timing under extreme conditions for consistent power delivery.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Pressure:\u003c\/strong\u003e 165 lbs seat @ 1.780 in, 440 lbs open @ 0.460 in lift with 155 lbs\/in rate for stable high-RPM operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoil Bind Height:\u003c\/strong\u003e 1.100 in supports cams up to 0.550 in lift preventing bottoming out\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Materials:\u003c\/strong\u003e Super clean chrome silicon steel springs and 10-degree titanium retainers resist fatigue and reduce valvetrain mass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Manufacturing:\u003c\/strong\u003e Shot peened, stress relieved and dyno tested for uniform rates across all 24 springs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Coverage:\u003c\/strong\u003e 24-piece set fits inline-6 S58 valvetrain directly with no modifications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eVerify installed height and valve stem clearance before final assembly\u003c\/li\u003e\n\u003cli\u003eUse with OEM or aftermarket valve locks and seals for best results\u003c\/li\u003e\n\u003cli\u003eSecure storage in cool dry place to preserve spring life\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended.\u003c\/li\u003e\n\u003cli\u003eMeasure spring installed heights and check retainer to guide clearance\u003c\/li\u003e\n\u003cli\u003eCompatible with stock BMW heads and Ferrea valves\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSubmodel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2020-2024\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX3 M\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2020-2024\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX4 M\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2021-2024\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003eSedan, Competition, xDrive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2021-2024\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003eCoupe, Convertible, Competition, xDrive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2023-2024\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM2\u003c\/td\u003e\n\u003ctd\u003eCoupe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhy Choose Ferrea?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e50+ years supplying valvetrain parts to professional racing teams worldwide\u003c\/li\u003e\n\u003cli\u003eSprings dyno tested to exceed OEM durability in boosted applications\u003c\/li\u003e\n\u003cli\u003eCNC machined retainers ensure perfect fit and balance in every kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Will KT4059 fit my 2022 BMW M3 Competition xDrive?\u003cbr\u003e\n \u003cstrong\u003eA:\u003c\/strong\u003e Yes it fits all 2021-2024 M3 models with S58 engine including Competition and xDrive variants\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What materials are used in the springs and retainers?\u003cbr\u003e\n \u003cstrong\u003eA:\u003c\/strong\u003e Springs use heat-treated chrome silicon steel, retainers are lightweight titanium with 10-degree lock angles\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What is the warranty and install process?\u003cbr\u003e\n \u003cstrong\u003eA:\u003c\/strong\u003e Ferrea offers a 1-year warranty against defects, install requires spring compressor tool and lash adjustment post-install\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e UPS Ground or FedEx Ground\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e In stock - ships same or next business day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Original Ferrea box measures 12 x 9 x 7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 5.2 lbs shipping weight\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ferrea","offers":[{"title":"Default Title","offer_id":43540252950607,"sku":"FERKT4059","price":1330.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/ferrea-15-24-bmw-s58-single-spring-kit-ferrea.png?v=1767411718","url":"https:\/\/www.blackopsautoworks.com\/products\/ferrea-15-24-bmw-s58-single-spring-kit","provider":"Black Ops Auto Works","version":"1.0","type":"link"}