HPI Savage 25 Chassis 13 Fin Engine Heatsink by 3Racing HSA-027/P  [HSA-027/P]

Overview

This is an RC-scale engine heatsink designed for HPI Savage 25 chassis applications. The 13-fin profile increases exposed surface area to help manage engine temperatures during nitro runs. It is intended as a direct-fit accessory for Savage 25 engine heads and for hobby use only, not for real vehicles.

The part serves a tuning role by adding thermal mass and additional fin area, which can alter warm-up and peak temperature behaviour on track. In practice that means you may observe slower heat soak and a more gradual temperature rise under consistent load, useful when refining nitro tuning or evaluating cooling airflow from the body and air intakes.

Installation is straightforward for experienced RC technicians: remove the stock cooling head, verify head-to-headstack clearance and alignment with the carburettor and body, then fit the heatsink onto the engine head. Check for interference with the exhaust and any surrounding components, and confirm secure seating before running the model. Always test at low RPM after fitting to confirm clearances.

Fitment notes: the design and fin count are sized for Savage 25 series engine heads, so confirm head compatibility before purchase. The heatsink is a scale RC accessory intended to work within the Savage 25 chassis envelope and to be used with nitro RC engines only.