aFe Twisted Steel Headers Up-Pipes & Down-Pipe 2011 - 2015 Silverado / Sierra 2500 / 3500 HD V8-6.6L Duramax (Diesel) LML

48-34139

Upgrade or replace your LML’s manifolds, up-pipes, and down-pipe with this all-in-one, bolt-on kit, designed to open up your exhaust flow for maximum performance.

• Includes Heavy-Duty Gauge, .120 Wall Headers, .120 Wall Up-Pipes, and .065 Wall Down-Pipe
• Brushed Finish 304 Stainless Steel Construction
• Optimized Tube Lengths, Smooth Transition Bends, and Mitered Collectors Improve Flow
• Includes 1/8" NPT and M14 Exhaust Gas Temperature Ports
• Factory Style Flanges, Straightforward Connections, and Quality Hardware for a Leak-Free Seal

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.

Vehicle Applications