08-12 SUZUKI HAYABUSA: M4 Retro Drag Slip-On Exhaust - Dual (Black) M4 Exhaust manufactures exhausts which add power and a more race-inspired sound to your bike as well as lowering the overall weight. Extra time on research and development ensures your exhaust has the ultimate in quality workmanship, ease of installation, and the best performance possible for your motorcycle. M4 Performance Exhaust engineered the Retro Drag dual slip on exhaust system to offer an original exhaust that provides performance increase along with the obvious sick looks with the black ceramic coating. The look of the M4 Retro Drag dual exhaust is not the only thing separating it from the others, the sound produced from this exhaust announces the pure power your machine is known for. Replacing your stock mufflers with the Retro Drag cans will lighten your load by 20+ pounds thanks to M4's diet plan of cutting out unnecessary materials.