The MagnaFlow 3.5in. Round Glasspack Performance Exhaust Muffler 18124 enhances your ride with the deep, classic sound that glasspack mufflers are known for. The round muffler body features a free-flowing reversible straight-through 2/2in. diameter configuration and single stage packing with a satin finish. This weight-optimized glasspack muffler is engineered to bring out the inner hot rod in your ride with plenty of volume and dyno-proven performance, so please check to ensure compliance with local noise regulations. 18124 offers flexibility when it comes to installation thanks to its universal design, however, professional installation is recommended.