Big news, PPE OEM Replacement Length Up-Pipes are now legal in all 50 states. These are a direct bolt-on to your factory manifolds and allow 53% greater flow than stock with significantly reduced exhaust back-pressure, faster turbo response, and lower exhaust temperatures. Unlike factory parts, PPE OEM Up-Pipes are made from 11 gauge 304 stainless steel and include PPE 304 stainless steel, internally-sleeved bellows that are tough against high temperature and high pressure. Available for 2001-2015 GM 6.6L Duramax 2500, 3500 HD Trucks, the suggested retail price is $499.99 - $649.99. (www.PPEdiesel.com/714-985-4825)