Genuine Traxxas 3527 U-Joint Coupler – Drive Shaft Part for Nitro Vee Boat. Includes1 Traxxas 3527 U-joint coupler. 🛠 Part #: 3527. Traxxas Nitro Vee boat (for driveshaft connection). Ideal for restoring broken or worn couplers in Nitro-powered Traxxas boats.