Clubman Spec: The Next Step in Performance Bourne HPP’s Honda K20 Clubman build is the perfect solution for track day enthusiasts and entry-level clubman racers looking to elevate their engine's performance. This build goes "one step further" than a standard refresh, integrating a range of custom Bourne HPP components designed to bridge the gap between a fast road car and a dedicated competitive racer. The Bourne HPP Standard Every engine build starts with a meticulous preparation process. Every component and bolt is either brand new or completely refurbished to ensure mechanical integrity and a show-quality finish: Complete Strip & Inspection: Every internal part is measured and verified against factory tolerances. Vapour Blasted Castings: Exterior engine castings are restored to a factory finish. Precision Machining: Dynamic Crankshaft Balancing for high-RPM smoothness. Cylinder Bores Honed to exact tolerances for optimal ring seal. Block and Head Faces Skimmed to ensure perfect gasket mating. Full Casting Deburring to improve oil return and eliminate stress risers. Cylinder Head Refurbishment: Valve guides replaced, with valve seats precision cut and lapped. Aesthetics: Finished with the signature Bourne HPP Blue Cam Cover High-Performance Engine Upgrades The Clubman spec features targeted upgrades to improve thermal management and valvetrain stability: Bottom End Pistons: Ceramic coated crowns for superior thermal protection and heat reflection. Oiling: Integrated Anti-Surge Baffle to prevent oil starvation during high-G cornering. Fasteners: ARP Head Studs for increased clamping force and head gasket reliability. Cylinder Head & Valvetrain Camshafts: Bourne HPP 21S Drop-In Camshafts Valves: Bourne HPP high-performance Inlet & Exhaust Valves Springs: Bourne HPP Upgraded Valve Springs Hardware: Bourne HPP specialized Inlet and Exhaust studs Technical Specifications Feature Details Engine Base Honda K20 Power Output 250BHP Build Type Hand Built Assembly Rev Limit 8,600 RPM Note: Any components or procedures not required for your specific build requirements will be reimbursed. We pride ourselves on flexibility; please contact us directly for bespoke engine assemblies tailored to your specific regulations or budget.
