This is the optional J"Tec Wraparound Pitts Muffler for the DLE 20cc Engine, DLEG0020. FEATURES: Polished aluminum construction INCLUDES: J"Tec Wraparound Pitts Muffler with two 4x30mm Socket Head Cap Screws and two 4mm Lock Washers REQUIRES: Fastening to engine with included hardware and threadlocker, GPMR6060 SPECS: Can Diameter: 1.5" (38mm) Can Length: 4" (102mm) Exhaust Outlet Diameter: 0.63" (16mm) Exhaust Outlet Length: 2.9" (74mm) jxs 12/13/10 ir/jxs