BD Diesel UpPipes Kit - Chevy 2001-2015 6.6L Duramax 1043800

304 stainless steel precision cast mounting flanges eliminate exhaust tubing blowouts and ensures correct fitment; 304L ?2" stainless tubing prevents loss of heat energy and will not corrode like aluminized steel or 409 stainless; Larger bore (1.8" ID) internally shielded 304 stainless bellows, eliminates restrictive 1.3" ID OEM bellows maximizing exhaust energy to drive turbocharger; Smooth mandrel bends improve exhaust gas flow - tubing ID is not compromised; Increased turbo response with lower EGT's; User must have aftermarket downpipe, does not fit with OE Downpipe; Requires tuner and removal of EGR