These Diamond Eye Performance turbo downpipes are available in aluminized steel and T409 stainless steel with mandrel bends for greater flow. Diamond Eye downpipes are offered in their QT Quiet Tone styles and in turbo direct pipes, too. The turbo direct pipes may have CNC-machined profiles and pocketed flanges or they may come wrapped with thermal header tape to help reduce EGTs--depending on your application. Get the best flow for your diesel with Diamond Eye Performance turbo downpipes.