Upgrade your Kenworth W900A with the Dynaflex Kenworth A-MOD Under Frame Exhaust Kit. This OEM-style kit includes multi-bend elbow exhausts with different options for top stacks, allowing you to choose the length and style that best suits your needs. The kit includes all necessary components, including a 1-year warranty, and is made in the USA with show-quality chrome. The signature KW double bend design fits behind the factory-equipped steps and box while still mounting to the OEM brackets. This kit is compatible with most Kenworth W900A models from 1960 to 1981. Freight ground shipping is available for $175.00 commercial or $225.00 residential (Continental USA only).