This is the Aluminum Exhaust Header for the Traxxas Revo.                                                                                               FEATURES:  Aluminum construction                                                                    Silver in color                                                                          Fluted on tuned pipe end for better silicone coupler connection                          Heatsink engine mounting flange                                                                                                                       INCLUDES: One Exhaust Header                                                                                                                                    REQUIRES: Assembly to vehicle                                                                                                                                   SPECS:    Length:                 59mm (2.32")                                  
Pipe diameters: 

Outside-13mm  (.52")                                  Inside -10mm  (.40")                                  
Width between engine exhaust mount holes: 22mm (.866")                                                                                                COMMENTS: If needed, engine/header mounting screws, use TRAG5142.