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{{Insert:Scorpion-Disclaimer}} The Scorpion Interchangeable De-Cat Header Kit - Kawasaki Ninja 400 2018 - 2019 is part of the latest Scorpion Exhausts collection. . In addition to the slip-on, technicians developed an interchangeable de-cat header upgrade kit for tuners looking to enhance the performance of the Ninja 400 further. The kit's constructed from T304 stainless steel and utilises mandrel bent pipework for superior gas flow over the original. The de-cat header kit invalidates the EC approval on any silencer fitted in conjunction with it. . O.E.M. Scorpion Comparison Weight 1.96 kg 2.78 kg -0.82 Key Features / Points: . Improved Performance . Superior Engineering . Lifetime Warranty . Fitting Instructions Included . British Manufactured . View all Scorpion Kawasaki Motorbike Exhausts. View all Scorpion Motorcycle Exhausts. . PLEASE NOTE: The de-cat header kit invalidates the EC approval on any silencer fitted in conjunction with it. . .