This is the J"TEC Pitts Style Wraparound Muffler for use on the DA50-55 and DL50-50 Engines. FEATURES: Aluminum construction Silver in color INCLUDES: One Pitts Muffler One 5x25mm Cap Head Screws One 5x35mm Cap Head Screws One washer/spacer REQUIRES: Installation on the engine SPECS: Can Diameter: 38mm (1.49") Outlet Tube Diameter: 22mm (0.87") Outlet Tube Length: 77mm (3.03") Distance Between Muffler Mounting Hole Centers: 40mm (1.57") Width of Exhaust Opening: 25mm (0.98") Height of Exhaust Opening: 14.5mm (0.57") lmm 7.13.10 ir/jxs