# aFe Twisted Steel Headers Up-Pipes & Down-Pipe 11-15 GM Diesel Trucks V8-6.6L (td) LML

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

-   Includes Heavy-Duty Gauge, .120 Wall Headers, .120 Wall Up-Pipes, and .065 Wall Down-Pipe
-   Optimized Tube Lengths, Smooth Transition Bends, and Mitered Collectors Improve Flow
-   Includes 1/8 NPT and M14 Exhaust Gas Temperature Ports
-   Brushed Finish 304 Stainless Steel Construction

This Part Fits:

Year

Make

Model

Submodel

2015

Chevrolet

Silverado 2500 HD

High Country

2011-2015

Chevrolet

Silverado 2500 HD

LT

2011-2015

Chevrolet

Silverado 2500 HD

LTZ

2011-2015

Chevrolet

Silverado 2500 HD

WT

2015

Chevrolet

Silverado 3500 HD

High Country

2011-2015

Chevrolet

Silverado 3500 HD

LT

2011-2015

Chevrolet

Silverado 3500 HD

LTZ

2011-2015

Chevrolet

Silverado 3500 HD

WT

2015

GMC

Sierra 2500 HD

Base

2011-2015

GMC

Sierra 2500 HD

Denali

2011-2015

GMC

Sierra 2500 HD

SLE

2011-2015

GMC

Sierra 2500 HD

SLT

2011-2014

GMC

Sierra 2500 HD

WT

2015

GMC

Sierra 3500 HD

Base

2011-2015

GMC

Sierra 3500 HD

Denali

2011-2015

GMC

Sierra 3500 HD

SLE

2011-2015

GMC

Sierra 3500 HD

SLT

2011-2014

GMC

Sierra 3500 HD

WT

## Details

- **Price:** 3706.55 CAD
- **Vendor:** aFe
- **Type:** Headers & Manifolds

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3706.55 CAD | In stock |

## Images

- Photo - Primary
- User 4

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/afe-twisted-steel-headers-up-pipes-down-pipe-11-15-gm-diesel-trucks-v8-6-6l-td-lml)
> Updated: 2026-07-15