Typically ship within a few business days *Does not meet emission requirements for street or highway use.   304 Stainless Steel Tubing Removes Catalytic Converter and SET Valve Stock 93 dB @ 7,000 RPM/ M4 dB 108 @ 7,000 RPM Saves 11.5 lbs Over Stock System Includes M18 and M12 O2 Bungs Stock Max Horsepower 171.42 @ 12,760 RPM/ M4 Max Horsepower 176.32 @ 12,890 RPM (All dyno numbers are on bone stock motorcycle with pump gas) Comes Pre-installed with Q5 Quiet Insert