The Aero Turbine XL 4040XL is a Resonated 4" i.d. inlet, 4" i.d. outlet.  The Aero Turbine XL 4040XL Muffler is composed of high quality 304 stainless steel, embossed with the Aero Turbine XL signature logo and polished to a mirror finish. Inside is a high temperature ceramic acoustic material followed by the patented air foil and louvered vortex chamber providing the deep throaty tone that any turbo owner will love.

The Aero Exhaust performance mufflers are the first exhaust products to combine the performance benefits of a straight through muffler without insulation that breaks down over time. The first true lifetime performance muffler. So whether you like the deep throaty sound of the Flowmaster or the straight through high flow design of the Magnaflow, you'll love the Aero Exhaust. Aero Exhaust performance mufflers are constructed with stainless steel both inside and outside.

As a universal muffler the Aero Turbine can be used on all makes and models; including gas, diesel and propane vehicles. It is also one of the only free-flow mufflers on the market that will hold up to NOS and still qualify as street legal.