Looking to add serious performance to your large-scale RC? The HPRC 38cc Race Ported Fujiwara Engine combines a genuine Fujiwara/Zenoah 40mm top end with a DDM +2mm stroker crankshaft and CNC race-ported intake, exhaust and transfer ports. Its 7075 aluminium billet reed case, oversized reed valve and carbon-fibre reed petals complete a performance-focused package designed to increase peak power and RPM over the factory cylinder configuration. The longer-stroke crankshaft also helps improve torque, making this an option worth considering for heavier builds and taller gearing.