The latest breakthrough in Diesel performance exhaust, the 4040 is the most highly rated temperature-reducing muffler on the market today.

The AT4040 is a 4" i.d. inlet, 4" i.d. outlet. The AT4040 was designed for high-output engines. It was the original Aeroturbine design. The AT4040 was first designed for the racecar circuit. It was proven on both the 600hp Monte Carlos of NASCAR, and the 800hp Sprint car races in Arizona. With feedback from the race circuit being as strong as it was, the AT4040 was then manufactured for introduction to the general public as the Aeroturbine Performance Diesel muffler. As the only muffler to have the patented airfoil technology, the AT4040 is the hottest new product on the performance Diesel market.

By design, the AT4040 is versatile enough to be applied to every American made passenger diesel truck, regardless of the make, model, or year. The AT4040 has been successfully applied and tested on nearly every year, make and model of Diesel truck on the market. The 3 1/2" exhaust pipe standard on most Diesel trucks can easily be bumped up to 4" or replaced with a full 4" exhaust pipe system. The length of the AT4040 muffler allows for dual inline mufflers to be placed on the Diesel vehicles as well. Dual inline Aeroturbines will actually increase airflow and performance, while dropping the EGTs even further than a single, which is directly contradictory to the performance you will see from any other competing muffler product. This is truly a testament to the performance enhancements that the Aeroturbine creates. The AT4040 will give the performance and sound that every performance enthusiast should expect from their vehicle.

The AT4040 is completely stainless steel inside and out. There is no packing or moisture collecting material in the muffler. The hand-polished stainless steel AT4040 will give you the look and feel that you want and the performance you deserve. The Aeroturbine Lifetime Warranty will guarantee that your investment is still performing as long as you own your vehicle.

Note: This muffler is designed for aftermarket exhaust systems or as a direct replacement for center in center out mufflers. Fabrication may be required.