The HSA-027/BU is a 13-fin heatsink shaped for the Tamiya F350 HILUX fin arrangement and specified for Savage compatibility, supplied in blue for a neat factory-style look.
Fitting is the usual process: remove the stock cooling head, slide this heatsink onto the engine head, then secure using the original head screws. Savage-compatible installations should not require chassis changes beyond routine access to the engine.
This heatsink increases the head's exposed area to help lower running temperatures during extended high-RPM use and to give you steadier behaviour when tuning or running longer sessions. It is a thermal management accessory rather than a power-increasing modification.
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