DHD LB7 Duramax Passenger Up Pipe Kit 2001-2004

These full featured OEM fit up pipes are an excellent value! These are brand new and include all the high flow, high quality features your looking for at half of a new GM LB7 up-pipe price. DHD has taken OEM replacement to a new level. This stock replacement up pipe allow 53% greater flow than stock and is a direct bolt-on to your factory manifolds. Unlike factory parts, our up pipe is manufactured from 11 gauge 304 stainless steel and includes DHD's HD 304 stainless steel, internally-sleeved bellow that can take the abuse of high temperature and high pressures. Our up pipe outweighs the competition by nearly a pound and features internal and external flange TIG welds! Features: Inner and Outer TIG welded Steel Flanges (Not cast like competitor) Stainless steel 11-gauge .120-inch wall, 2-inch OD Up-Pipe Direct bolt-on replacement to passenger side factory exhaust manifold   Significant reduction in exhaust back-pressure Lower exhaust temperatures  Free-flowing stainless steel inner li