Beach RC says... This is the O.S. T-2060SC WN polished one piece tuned pipe with manifold. This is the one piece variety and includes an off-road manifold, which attaches to the tuned pipe using three small springs (included). This pipe is designed specifically for O.S. engines such as the O.S V-Spec engines and is a new designed pipe for those engines providing excellent bottom end and top end performance. This pipe also features a welded nipple so you won't have to worry about losing back pressure due to an air leak.