From Factory Team:
G10 fiberglass is a great upgrade to increase arm stiffness and durability over the stock plastic suspension arm inserts! While G10 is a more flexible material than carbon fiber, these inserts are thicker than the current carbon fiber inserts (1.2mm vs. 2.0mm), so these inserts are stiffer than the current carbon fiber parts. Perfect for the upcoming heat of outdoor season!
Each set contains two inserts – one left and one right.
Fits: RC8B3.2, and RC8B3.2e suspension arms (#81434, #81438, #81442).
#81437 – RC8B3.2 FT Rear Suspension Arm Inserts, G10, Rear, 2.0 mm – $18.99 MSRP
#81441 – RC8B3.2 FT Lower Suspension Arm Inserts, G10, Front Lower, 2.0 mm – $14.99 MSRP
#81445 – RC8B3.2 FT Upper Suspension Arm Inserts, G10, Front Upper, 2.0 mm – $13.99 MSRP