Kawasaki Ultra 300 and 310 Exhaust Filter Bypass Kit. This will fit all models 300 and 310. This is to bypass the restrictive exhaust filter from Kawasaki. Made of premium high strength 5052 Marine Aluminum and black hard coated for corrosion resistance and sleek look. KP designed this out of aluminum instead of stainless steel since it has shown to reduce exhaust temperatures during very hot days. Which can rob you of HP! The aluminum is a very good conductor of heat unlike stainless steel. This is designed to more evenly cool the exhaust. This kit comes with gaskets! Please contact us with any questions.