Helix Racing Products HEAVY DUTY MUFFLER PACKING - 160-1112

High density fiberglass muffler re-pack. Tight weave high density packing is preferred by 4 stroke riders to control sound & backpressure. Can be applied to muffler core in layers that allow for fine tuning of backpressure that effects the torque curve to achieve desired feel & performance. For street or off-road machines.