{"product_id":"kras55bi-evo-turbocharger-upgrade-system","title":"KRAS55Bi-EVO Turbocharger Upgrade System","description":"The KRATOS KRAS55Bi-EVO is a high-performance turbocharger upgrade system engineered for BMW M3, M4, and M2 Competition models equipped with the S55 engine. At its core is a one-piece turbo-fold, a feat of engineering combining manifolds and turbine housings into a single investment-cast 316 stainless steel unit. This design contributes to a mathematically matched A\/R ratio, reduced heat, increased turbine efficiency, and smoother internal transitions, all validated by Computational Fluid Dynamics modeling.\n\nA key innovation is the proprietary silicon nitride ceramic ball bearing technology. The bearing cartridges are built to withstand extreme abuse and are endurance race tested for reliability.\n\nThe compressor wheels are sculpted from forged billet aluminum, featuring third-order geometry designs achieved through point milling. For even greater performance, an optional Ti6Al4V titanium compressor wheel is available, offering superior strength for more aggressive designs and suitability for road race or endurance applications. The KRAS55Bi is capable of supporting up to 850+ wheel horsepower on a stock engine with supporting modifications, and up to 900+ whp with a built engine and cylinder head.\n\nTo complement the increased compressor diameter, the S55 system includes custom-designed four-ply silicone inlets with a match-ported, polished billet aluminum elbow. These inlets offer direct fitment to OEM crankcase ventilation and intakes.","brand":"KRATOS","offers":[{"title":"Default Title","offer_id":52686553317688,"sku":"KRAS55Bi-1","price":7895.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/659229317.webp?v=1784874841","url":"https:\/\/store.motormia.co\/products\/kras55bi-evo-turbocharger-upgrade-system","provider":"MOTORMIA","version":"1.0","type":"link"}