- Discover the ultimate selection of 44 Inch Stacks for your semi truck, meticulously designed to enhance both performance and style. Our premium range includes the 44 Inch Curved Top Stack 7 Inch to 5 Inch Plain End, 44 Inch Curved Top Stack 7 Inch to 5 Inch, 44 Inch Short 30 Top Stack 7 Inch to 5 Inch, and 44 Inch Short 30 Top Stack 7 Inch to 5 Inch Plain End. For a sleek, mitered look, choose the 7 Inch to 5 Inch Plain End Mitered Top Stack or the 44 Inch Miter Top Stack 7 Inch Reduced to 5 Inch. Elevate your exhaust system with the 44 Inch Bullhorn Exhaust with 7 Inch Reduced to 5 Inch O.D., or opt for the 44 Inch Flat Top Exhaust with 7 Inch Reduced to 5 Inch O.D. For a touch of West Coast flair, the 44 Inch West Coast Curve with 7 Inch Reduced to 5 Inch O.D. is a perfect fit. Make a bold statement with the 44 Inch Diablo Exhaust with 7 Inch Reduced to 5 Inch O.D. or the 44 Inch Diablo Exhaust with 7 Inch Reduced to 5 Inch I.D. Each stack is crafted for durability and optimal performance, ensuring your semi truck stands out on the road. Whether you're converting 33mm to inches, looking for 57 inch tail lights, or need a 4 inch exhaust pipe, our selection has you covered. Shop now and upgrade your exhaust system with our premium 44 Inch Stacks, and make your semi truck the envy of the highway!