This is a Pair of Stock Replacement Cup Joints for the HPI Savage. These are located at the differentials. FEATURES: Steel construction YOU WILL RECEIVE: Two cup joints Two half-threaded shafts REQUIREMENTS: Nothing. These are direct replacement parts. SPECIFICATIONS: Length: 20mm (0.8") Outer diameter: 13mm (0.51") cmc 11/13/02 ir/kh &