HPI Savage 21 / Savage 25 / Savage X 13 Nitro Fin Heatsink - HSA-027/BL by 3Racing  [HSA-027/BL]

Cooling Fin Heatsink for Savage Nitros

The fin-type engine heatsink is a scale accessory suitable for HPI Savage 21, Savage 25 and Savage X 13 vehicles and is supplied as 3Racing HSA-027/BL. It sits over the nitro engine head to expand the effective cooling surface and help manage cylinder head temperature during heavy or extended use.

Installation is straightforward for heads that accept an external heatsink; retain original head screws where practical and ensure full, even contact between the heatsink base and the head. Standard hobby hex drivers and spanners are all that are normally needed.

Use this part as a passive cooling upgrade rather than a tuning change: it will not affect fuel settings or carburettor adjustments but can reduce peak temperatures during long sessions. Keep fins clear of debris and re-check fasteners after initial runs to maintain performance.