Now you have many options if you are in the market for a dual exhaust system.We developed a way to offer all of our free-flowing exhausts stemes with a variety of muffler options.This makes the SFR exhaust system the most versatile system on the planet.You have your choice of HKS,Burns,Borla or Magnaflowor even our own TIG welded 304SS SFR mufflers.