S3 Parts Hard Enduro Expansion Chamber - the ultimate upgrade for your motorcycle! This expansion chamber comes complete with o-rings, silent blocs, fasteners kit, for easy installation. Its higher and more compact design reduces the risk of damage while providing top performance, with a smooth bottom and good medium and high output. The reinforced welding ensures it is stronger and safer than standard expansion chambers. The PLATINIUM finish features a chrome-plated surface with an excellent anti-rust finish for added durability. Don't settle for anything less than the best with the S3 Parts Platinum Expansion Chamber!