- Upgrade your semi truck with our premium selection of 54 Inch Stacks, meticulously designed to enhance both performance and style. Choose from a variety of top-quality options, including the 54 Inch Miter Top Stack with both 6 Inch to 5 Inch Inside and Outside Diameters, the sleek 54 Inch Flat Top Stack available in Plain End and standard versions, and the 54 Inch Curved Top Stack also offered in Plain End and standard models. For a unique look, consider the 54 Inch West Coast Curved Top Stack with Inside and Outside Diameter options, or the bold 54 Inch Bull Horn Top Stack. We also offer the 54 Inch Short 30 Top Stack in both Inside and Outside Diameters, and specialized stacks like the 6 Inch to 5 Inch Plain End Curved Top Stack, Mitered Top Stack, and Flat Top Stack, all in 54 Inch lengths. Whether you're looking for a mitered, flat, curved, or bullhorn top, our stacks are engineered for durability and optimal performance. Shop now to find the perfect fit for your semi truck and experience the difference in quality and design. Don't forget to check out our other essential truck parts, such as 57 inch tail lights, 4 inch exhaust pipe, and the 696854 oil filter part number Fram. Convert measurements easily with our handy guides for 33mm to inches, 105mm to inches, and 170mm in inches. For additional needs, explore our 68 inch to ft conversion, 5 inch exhaust pipe options, and the reliable Dorman radiator cap 54201. Enhance your truck today and drive with confidence!