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RPM Oversized Front Spindle Blocks for the ECX Boost, Circuit 2WD, Ruckus 2WD and Torment 2WD are designed to improve performance and durability of yuor ECX vehicle. RPM Oversized Front Spindle Blocks bump up the bearing size to 5x11x4mm bearings (not included), nearly doubling all load and fatigue ratings over the stock bearing size! That means better performance, longer life and more time between maintenance periods. Each set of RPM spindle blocks is molded from their ultra-durable nylons refined to keep you rolling when everything else would have fallen apart. These parts retain all stock geometry for a direct, no complications swap and are backed by RPM's limited lifetime warranty against breakage.
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