Packing is one of the most important elements of your Big Gun exhaust. Since all Big Gun mufflers are packing-style mufflers that contain packing material within them, they eventually require maintenance. Ensuring you have as full a muffler as possible will prolong the life of your exhaust. The EXO Packing is made specifically to fill an EXO muffler with regard to overall length and volume. 12" pillow-style, high-temp packing material for easier installation. High-temp loose-fill packing material condensed into an outer casing (resembling a pillow). Rated at approximately 20 - 25 hours of ride time (note: This is an average and actual packing life can vary by model, usage, tuning, etc.). Maintains noise levels while keeping the power gains from your exhaust at their peak. Keeps overall heat of the muffler down. Can be used with all EXO Series and EXO stainless mufflers.