AFE Twisted Steel Shorty Headers with Up-Pipes and Down-Pipe; 4-Bolt Flange (11-15 6.6L Duramax Sierra 3500 HD)Find parts that fit my vehicle

Description. Stainless Steel Construction:The headers are constructed out of heavy duty gauge, mandrel-bent 304 stainless steel tubing with a .120" wall for strength and durability. The up-pipes and down-pipe are constructed out of 2" and 3" mandrel-bent 304 brush finished stainless steel tubing.

Optimized Tube Lengths:Tube lengths and mitered collectors are optimized for true pulse control technology which improves flow and performance across the power band.

Heavy-Duty Flanges:A CNC-machined v-band inlet flange and heavy-duty outlet flange provide a secure, leak-free seal.

EGT Ports:Two exhaust gas temperature (EGT) ports are provided with this system. A 1/8” NPT EGT probe port is incorporated into the driver’s side manifold and a M14x1.5 port in the down pipe. This allows for easy installation of sensors, gauges or testing equipment.

4" Interlock Flex Pipes:The up-pipes utilizes heavy duty 4" flex tubes with internal interlock liners.

Retains EGR Flange:This system retains the EGR flange.

Factory Mounting Locations:These headers utilize factory locations making it a true bolt-on system, no cutting or drilling required and includes all necessary hardware for a hassle-free installation.

Fitment Note:This item will not fit models manufactured after July 2014 equipped with a 3 bolt flanged down-pipe.

Emissions Disclaimer:This product is not currently CARB exempt and is not available for purchase in California or for use on any vehicle registered with the California Department of Motor Vehicles.

aFe POWER exhaust systems are engineered and manufactured in our Corona, California facility.

Fitment:

• 2011 GMC Sierra 3500
• 2012 GMC Sierra 3500
• 2013 GMC Sierra 3500
• 2014 GMC Sierra 3500
• 2015 GMC Sierra 3500

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov