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

Engine Head Fin Heatsink for Savage

This fin-style engine heatsink is an accessory for HPI Savage 21, Savage 25 and Savage X 13 models and is listed as 3Racing HSA-027/BL. It fits over the nitro engine head to increase exposed metal area so heat is shed more efficiently under load.

Mounting is typically simple on compatible heads that accept accessory heatsinks; reuse original head screws where possible and ensure the heatsink sits flat on the head to avoid uneven pressure. No special equipment is required beyond common hobby tools.

Consider the heatsink a passive thermal aid: it does not alter carburation or fuel requirements but can help reduce peak cylinder head temps on extended runs. Clean fins after dusty or muddy use and re-check mounting security after initial testing.