Up for sale is FMF 4-STROKE REPACKING PILLOW 15302. The vendor part number is 15302. Please read title to know what you are getting. The catalog decription.... is Did you know a freshly packed silencer or muffler actually restores power?Our Performance Packing is comprised of fine, blended interwoven fiberglass fibers made to FMF’s specifications for high heat resistance, great sound attenuation and optimum performance and longevity. Look for FMF’s distinctive red performance packing.