That is a supplementary pulley synthetic component the TRF420 race chassis device. Make use of it to replace worn-out pulleys inside drivetrain to keep your vehicle or vehicle operating effectively and smooth.
• TRF420 37T Differential Pulley x1
• TRF420 Differential Case x1
• 0.2mm & 0.3mm Shims x2 each
• the newest design not only provides a weight cost savings of 1.5g, and less oil leakage when compared to past designs.
• appropriate for TRF420 and TA07 framework automobiles.