If you aim to make some noise and be heard by all - then look no further than the Flowmaster 40 Series mufflers. Just the features you want in an aggressive, rich sounding muffler to provide the performance and tone you expect from a name like Flowmaster. The Flowmaster 40 Series mufflers offer that unique, aggressive sound for the guy who wants to hear his machine roar, both inside and outside of the cockpit. Flowmaster 40 Series mufflers are offered in numerous configurations and materials to fit any build and budget. Fully MIG welded for a lifetime of music to your ears!