{"product_id":"kelford-cams-extreme-racing-valve-springs-bmw-b58-s58-3-0l","title":"Kelford KVS58-BTX Extreme Racing Valve Springs – BMW B58 \/ S58","description":"\u003cp\u003e\u003cstrong\u003eKelford KVS58-BTX Extreme Racing Valve Springs\u003c\/strong\u003e are the high-energy valvetrain package for high-boost, high-horsepower BMW B58 and S58 3.0-litre inline-six builds.\u003c\/p\u003e\u003ch3\u003ePackage\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eProgressively wound PACALOY beehive valve springs\u003c\/li\u003e\n\u003cli\u003eTitanium retainers\u003c\/li\u003e\n\u003cli\u003ePrecision-machined spring seats\u003c\/li\u003e\n\u003cli\u003eDesigned to complement Kelford Stage 2 and Stage 3 camshaft combinations\u003c\/li\u003e\n\u003cli\u003eIntended for engine combinations exceeding 1000 hp where the complete valvetrain has been engineered accordingly\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKelford published setup data\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e105 lb seat pressure at 35 mm installed height\u003c\/li\u003e\n\u003cli\u003e210 lb at 10.8 mm valve lift\u003c\/li\u003e\n\u003cli\u003e23.6 mm coil-bind height\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003eThis is a motorsport valvetrain component. Installed height, open pressure, coil-bind clearance, retainer-to-seal clearance and camshaft compatibility must be measured by the engine builder. Confirm the latest Kelford data for the cylinder head, cam profile and intended RPM range before assembly.\u003c\/p\u003e\u003cp\u003eBuilt by Boost \u0026amp; Tune can assist with B58\/S58 valvetrain specification and engine assembly.\u003c\/p\u003e\u003ch2\u003eSupplier\u003c\/h2\u003e\u003cp\u003eKelford Cams\u003c\/p\u003e\u003ch2\u003eProduct System\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eEngine Parts\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBMW 1 Series F20 Lci B58\u003c\/li\u003e\n\u003cli\u003eBMW 1 Series F21 Lci B58\u003c\/li\u003e\n\u003cli\u003eBMW 2 Series F22 Lci B58\u003c\/li\u003e\n\u003cli\u003eBMW 2 Series F23 Lci B58\u003c\/li\u003e\n\u003cli\u003eBMW 2 Series M240I G42 B58\u003c\/li\u003e\n\u003cli\u003eBMW 3 Series F30 Lci B58\u003c\/li\u003e\n\u003cli\u003eBMW 3 Series F31 Lci B58\u003c\/li\u003e\n\u003cli\u003eBMW 3 Series Gt F34 B58\u003c\/li\u003e\n\u003cli\u003eBMW 340I M340I G20 G21 B58\u003c\/li\u003e\n\u003cli\u003eBMW 4 Series F32 Lci B58\u003c\/li\u003e\n\u003cli\u003eBMW 4 Series F33 Lci B58\u003c\/li\u003e\n\u003cli\u003eBMW 4 Series G22 B58\u003c\/li\u003e\n\u003cli\u003eBMW 4 Series G23 B58\u003c\/li\u003e\n\u003cli\u003eBMW 4 Series Gran Coupe F36 Lci B58\u003c\/li\u003e\n\u003cli\u003eBMW 4 Series Gran Coupe G26 B58\u003c\/li\u003e\n\u003cli\u003eBMW 5 Series G30 B58\u003c\/li\u003e\n\u003cli\u003eBMW 5 Series Touring G31 B58\u003c\/li\u003e\n\u003cli\u003eBMW M2 G87 S58\u003c\/li\u003e\n\u003cli\u003eBMW M3 G80 G81 S58\u003c\/li\u003e\n\u003cli\u003eBMW M3 G80 S58\u003c\/li\u003e\n\u003cli\u003eBMW M3 Touring G81 S58\u003c\/li\u003e\n\u003cli\u003eBMW M4 Convertible G83 S58\u003c\/li\u003e\n\u003cli\u003eBMW M4 G82 G83 S58\u003c\/li\u003e\n\u003cli\u003eBMW M4 G82 S58\u003c\/li\u003e\n\u003cli\u003eBMW X3 G01 B58\u003c\/li\u003e\n\u003cli\u003eBMW X3 M F97 S58\u003c\/li\u003e\n\u003cli\u003eBMW X4 G02 B58\u003c\/li\u003e\n\u003cli\u003eBMW X4 M F98 S58\u003c\/li\u003e\n\u003cli\u003eBMW X5 G05 B58\u003c\/li\u003e\n\u003cli\u003eBMW X6 G06 B58\u003c\/li\u003e\n\u003cli\u003eBMW X7 G07 B58\u003c\/li\u003e\n\u003cli\u003eBMW Z4 G29 B58\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eConfirm chassis, engine, drivetrain and production-year compatibility before ordering.\u003c\/p\u003e\u003ch2\u003eSupplier Part Number\u003c\/h2\u003e\u003cp\u003eKVS58-BTX\u003c\/p\u003e\u003ch2\u003eBuilt by Boost \u0026amp; Tune Support\u003c\/h2\u003e\u003cp\u003eBBT can assist with fitment review, installation, supporting modifications, configuration and calibration requirements where applicable.\u003c\/p\u003e","brand":"Kelford Cams","offers":[{"title":"Default Title","offer_id":43756159598659,"sku":"KVS58-BTX","price":1050.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/0659\/4883\/files\/extreme-valve-springs-for-BMW-B58-and-S58-Engine-2.webp?v=1786095482","url":"https:\/\/builtbyboostandtune.com.au\/products\/kelford-cams-extreme-racing-valve-springs-bmw-b58-s58-3-0l","provider":"BUILT BY BOOST AND TUNE","version":"1.0","type":"link"}