17-21 Kawasaki Z900 M4 Tech 1 Slip-On With Carbon Muffler Saves 2 lbs over stock No re-mapping required Stock 89 DB @ 5,000 RPM/ M4 92 DB @ 5,000 RPM Retains stock Catalytic Converter Q7 quiet insert sold separate
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17-21 Kawasaki ZX900 M4 Stainless Steel Headers M4 Performance Exhaust universal header kit for the Z900. The 304 stainless steel system features equal length headpipes and a true high flow merge collector. The system will fit most aftermarket slip-on’s or even the stock muffler. Using the M4 header saves you 10lbs and produces 5+ horsepower over the stock pipe. High Quality 304 Stainless Steel M4 Header Kit Weighs 7.8 lbs Stock Header 18 lbs (Stock Full Pipe...