Roadworks - 6 Inch Slash Cut Exhaust Kit For Kenworth W900L With 40 Inch Boxes And Dual Cat Converters - FREE SHIPPING TO ALL ADDRESSES IN LOWER 48 STATES - Chrome Plated Steel Exhaust Kit - Choose Between Aero Cab And Non-Aero Cab - Kit Includes The Following Components; (2) 6 Inch Diameter Slash Cut Top Stacks - Choose Either 96, 108 Or 114 Inch Length - (2) Elbows Reduced To 5 Inch Diameter Desigend For Trucks With 40 Inch Boxes And Dual Cat Converters - (2) Upper Aero Cab Clamps Or Non-Aero Cab Clamps (Depending On What Style You Choose In Dropdown) - (2) Clamps Without Brackets - (2) Frame Mount Clamps - Boilermaker (Curve) And Stove Top (Flat Top) Available In Other Kits - Free Shipping To All Lower 48 States - Residential And Commercial Addresses Apply For Free Shipping - Fits Most Kenworth W900L Aero Cab Models With 40 Inch Boxes And Dual Catalytic Converters - 2 Year Warranty