The New Kawasaki ZX-10R M4 Street Slayer Carbon Slip On Exhaust will eliminate the stock catalytic converter which adds power and drop over 10 pounds of weight. The Street Slayer Slip On offers an aggressive look and sound that will separate your ZX10 from all others. Weight Savings: 10.6 lbs Valve Removal: YES Remove Cat. Converter: YES Come with O2 bung?: YES/M18 Stock DB/RPM: 95/7000 M4 DB/RPM: 102/7000 Stock Max HP/RPM: 170.4/11,800 M4 Max HP/ RPM: 173.01/11,800 Come with a quiet insert? YES/Q5 Stage 2 quiet insert (Q4) sold separate M4 Exhaust - Additional Information: Full Systems - For the ultimate in performance, complete tuned stainless steel systems include all mounting hardware. Optional mounting styles and materials available for select systems. Bolt On/Slip Ons - These systems utilize the stock header assembly. Bolt on and slip ons replace the stock restricted muffler resulting in better sound and an increase in power. Headpipe/Collector Assembly - Full systems include tapered and equal length headpipes with true high-flow merge collectors. Silencer - M4 silencers look as good as they perform. Polished steel, titanium, black satin and carbon fiber silencers are offered to suit your style. Midpipe - Careful design of the midpipe is necessary to give exhaust gasses optimum flow and improved power characteristics. The M4 Exhaust Can for this application includes a Stage 1 part # Q5 (Installed).