The HSA-027/BU is a compact 13-fin heatsink formed to match the Tamiya F350 HILUX fin layout and specified for Savage compatibility, supplied in a blue finish to suit common builds.
Installation follows standard nitro head replacement steps: remove the stock cooling head, slide the heatsink onto the engine head, and secure using the engine's existing head screws. No chassis alterations are normally needed beyond routine engine access on Savage-style mounts.
Its purpose is thermal management — enlarging exposed surface area to help reduce cylinder head temperatures during sustained high-RPM operation and to provide a steadier baseline when adjusting needle settings or trying different fuels. It is not intended to increase peak power but to support consistent running and tuning sessions.
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