Description
These are upgrade parts which compatible with Arrma Typhon Mega550, Granite Mega550, Senton Mega550;.Replacement of Parts# ARA311030, the 91T 48dp spur gear slipper clutch and 17T 19T 21T pinions gear set;.Made of harden steel #45, stronger and great durability to achieve smooth driving performance;.Precision CNC machined hop-up parts for factory spec fitment, easy to use, easy to replace;.If you are not 100% completely satisfied with our products, please do not hesitate to contact us to request a refund or exchange!