HPI Savage 21/25/X Nitro Head Fin Cooler - HSA-027/R by 3Racing  [HSA-027/R]

Fin cooler designed for Savage nitro heads

This fin-type heatsink is a scale accessory built to fit HPI Savage 21, Savage 25 and Savage X 13 engine heads. It acts as a passive cooling aid by increasing the head surface area and improving heat rejection while running. This item is intended solely for model engines and not for real vehicle use.

Installation is simple for those experienced with nitro engines: remove the existing head, check thread and space, then slide the heatsink over the head and confirm it does not contact the carburettor, exhaust or chassis. Always verify rotating clearance before the first run and after a heat cycle.

In practical tuning terms the heatsink helps control high engine temperatures by expanding surface area and aiding airflow-based cooling. It is most effective when combined with sensible routing of airflow by the body and regular checks of fuel mixture and exhaust condition.

A straightforward fin heatsink for Savage heads that should be trial-fitted and monitored during initial runs as part of routine engine care.