The performance muffler that has to be installed to be believed, the Aero Exhaust Turbine Muffler is the most effective upgrade for the money that you can buy for your diesel. We’ve sold thousands of Aero Mufflers over the years, and we never get tired of singing it’s praises. Better fuel economy, improved power and driveability, and reduced EGT’s. If you never modify anything else on your diesel, you owe it to yourself to install an Aero Exhaust Turbine Muffler.