HPI Savage Fin Heatsink Compatible with 21/25/X 13 HSA-027/G by 3Racing  [HSA-027/G]

Fin heatsink engineered for Savage heads

This fin-style heatsink is made to sit over the engine head on HPI Savage 21, Savage 25 and Savage X 13 variants that share the same head geometry. The gold finish and fin spacing expand the cooled surface around the head to help dissipate heat during longer runs and rough bashing.

Fitment applies only to the specified Savage variants that use the common head profile. Before fitting, inspect the head shape and measure clearances under the body and near the exhaust and carburettor to avoid interference. The heatsink attaches using the head's existing mounting points and is intended as a bolt-on external cooling aid for nitro engines.

To install, place the heatsink on the engine head, align fins with expected airflow, and reuse the head screws or studs where suitable. Make sure the part does not touch the muffler or bodywork at full suspension travel, and confirm glow plug accessibility after installation. Recheck fasteners and clearances after a few heat cycles.

Operational notes: this is a passive cooling accessory and will not change engine timing or internal tuning. Use telemetry or a temperature probe and adjust body vents or muffler routing as needed for optimal cooling. Treat the heatsink as one element in your overall cooling plan.