Skunk2s MegaPower Exhaust Silencers are engineered as free-flowing mini-mufflers. Each silencer is manufactured from perforated, stainless steel tubing thats wrapped in stainless steel wool and mesh for significant noise reduction and minimal restriction. MegaPower Exhaust Silencers are compatible with all Skunk2 MegaPower Exhaust systems, including 60mm, 70mm, and 76mm versions.