RK Autowerks B58 & S58 Engine Fire Rings

DescriptionRK Fire Rings are engineered to eliminate that risk by creating a mechanical seal between the head and block. Designed specifically for B58 and S58 engines, these precision-machined rings fit within grooves cut into the engine block and bite into the head during torque-down, reinforcing the gasket seal exactly where you need it most.Each set includes six fire rings, intended for use with inline-6 BMW engines.Whether you’re pushing 800 WHP or just want bulletproof reliability, Fire Rings are a proven solution trusted in both street and race environments. These rings are fully compatible with OEM BMW head gaskets, allowing you to retain stock gasket functionality while gaining race-level sealing performance.Please note: This listing is for the Fire Ring hardware only. Labor is not included. For machining and installation services, click here:Fire Rings Installation serviceKey Features:Enhanced sealing for high-boost and high-compression buildsCompatible with OEM BMW head gasketsPrecision machined for B58 and S58 platformsPrevents combustion blow-by and gasket failureIdeal for E85, big turbo, or race applicationsRequires block machining (professional installation recommended)Technical Specifications: Material: Hardened Steel AlloyConstruction Method: CNC Precision MachinedInstall Type: Requires machining of engine blockCompatibility: Works with OEM head gasketsApplications: Compatible With BMW Engines: B58 – G20 M340i, G87 M240i, A90 Supra, G30 540i, etc.S58 – G80 M3, G82 M4, G87 M2, F97 X3M, F98 X4MInstallation and Support: Installation requires machining grooves into the engine block and proper torquing of the head. RK offers full install services for fire ring machining, assembly, and engine build coordination. Book install here:Fire Rings Installation serviceWhy Choose RK Autowerks: Every component we offer is backed by real-world testing and precision-engineered in-house to support serious power. Our Fire Rings are trusted in builds well past 1000 WHP because sealing failure should never be your limiting factor.Warranty: RK Autowerks Warranty & Legal