2006-2010 6.6L Duramax High-Flow Performance Studded Intercooler (115041100)Description Testing has shown that the factory GM intercooler causes a 2 to 3 (plus) psi pressure drop, so the boost from even the largest turbocharger can be choked if the intercooler is inefficient. With PPE's High Flow Performance Intercooler, pressure drop (wasted energy) is virtually eliminated. There is simply no comparison between the effectiveness of the PPE High Flow Performance Intercooler and the stock unit. Providing 2,142 cu. in. of