The RPM REAR A-ARMS for the ARRMA Granite, (Vorteks, Raider, Fury & Mojave,) are a heavy-duty, engineering-grade nylon rear suspension arm pair designed exclusively for 1/10 scale 2WD ARRMA platforms. 
They replace stock ARRMA #AR330225 arms, tighten hinge-pin tolerances to reduce suspension slop, and flex under hard impacts instead of snapping.
Design Improvements: Beefier cross-sections around the hinge-pin bosses, angled leading edges for smoother obstacle clearance, and tighter hinge-pin tolerances that reduce rear suspension slop for more predictable camber and toe stability.
Box Contents: 1x Left Rear A-Arm and 1x Right Rear A-Arm (Black).
Works with most 1/10 2WD BLS, BLX, and MEGA variations of the Granite 2WD, Vorteks 2WD, Raider XL 2WD, Fury 2WD, and Mojave 2WD that use stock arm #AR330225.
As RPM R/C Products notes, #81452 will not fit 4X4 Granite or Vorteks trucks (which require RPM #81502 or #80842 depending on model width).