Offers consistent packing density Cut Installation time in half 25% lighter than stock packing Last 5-10 times longer than glass mat packing Outer casing made from carbon-coated fiber, which remains intact for removal of used part If the muffler has been modified from the original length and falls between lengths, order the next longest cartridge available on your muffler Made in the U.S.A.. PACKING PILLOW 16" Large Body 2T