01. The chrome with black, slotted end-capped Street Performance Staggered Dual Mufflers provide an edgier look, and a nice increase in horsepower and torque. The Stage I Air Cleaner Kit flows air to the engine more optimally. A one-piece cast backplate, air filter, breather, and hardware is included. The chrome Smooth Air Cleaner Cover features a cutaway design to work in conjunction with flowing more air to the Stage I Air Cleaner assembly.