2001-2004 GMC Chevy Duramax 6.6L LB7 - BD's Duramax up-pipe kit uses 304L 2-inch stainless tubing which prevents loss of heat energy and will not corrode like aluminized steel or 409 stainless. Must have aftermarket downpipe - will not fit OEM down pipe.

• 304 stainless steel precision cast mounting flanges eliminate exhaust tubing blowouts and ensures correct fitment
• 304L 2-inch 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