The Kyosho 94078 SUS Turn Fin R&L is a scale RC replacement fin set supplied as distinct left and right pieces, intended for use on Jet Stream 600 boats. The SUS designation denotes stainless-style metal chosen for marine resistance and long-term durability in model boating use.
In operation this left/right pair provides adjustable stern guidance, allowing fine-tuning of yaw and improving tracking from the jet outlet. As direct replacements they mount in the same locations as the original fins and alter the aft water flow to change handling balance on the water.
Installation notes: the fins come as R and L components and attach to the factory mounting points using the existing hardware. Confirm correct left-right orientation, align both fins to the hull centerline, and verify there is adequate clearance to the jet nozzle through full throttle and steering throw.
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