Remember the 4 door Porsche? The only Mercedes-Benz / Porsche collaboration was the Old W124 E500 that came with a 5.0 Liter engine and flared fenders. We never understood why they didn't make a Coupe version so we are making it ourselves.
Installation of the Horn Blaster's horn air 540 complete on-board system along with the custom fabrication of flat plate steel mounting brackets and 1/2 inch SMC nickel valve fitting kit. F-450 Super Duty along with the K5 horns equals a heart pounding blast that can be heard over 5 miles away!