aFe Exhaust Header 11-15 GM Silverado/Sierra 6.6L Duramax
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This item may be on backorder. Please contact us to confirm supplier availability and estimated lead time before ordering.
Regular price
$2,593.00
Regular price
-20%
$3,241.25
Sale price
$2,593.00
Oversized Item
This item ships by freight. Shipping isn't calculated at checkout — we'll contact you with a freight quote after your order is placed.
Verified Fitment & Application Support
This product is selected for proper fitment and compatibility with the listed engine application. Our team is available to assist with fitment questions, installation considerations, and supporting components to ensure a smooth install and reliable performance.
Got Questions? Feel free to email us or call us at (503) 235-1947
Compliance & Restrictions
California Proposition 65 (Prop 65)
WARNING: This product can expose you to chemicals which is known to the State of California to cause cancer and/or reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
CARB / California Emissions Compliance
This item may be restricted in California and other regions with emissions regulations. If applicable, it is intended for
competition/off-road use only unless otherwise stated. It is the customer’s responsibility to confirm local compliance before purchase.
Orders shipping to restricted areas may be canceled.
The aFe POWER Twisted Steel Exhaust Header (part number 48-34139) is engineered as a direct-fit upgrade for the 2011-2015 GM 6.6L Duramax.
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.
Vehicle Fitment
- 2011 - 2015 Chevrolet Silverado 2500 HD 6.6L Duramax
- 2011 - 2015 Chevrolet Silverado 3500 HD 6.6L Duramax
- 2011 - 2015 GMC Sierra 2500 HD 6.6L Duramax
- 2011 - 2015 GMC Sierra 3500 HD 6.6L Duramax
Features & Benefits
- Equal-length primary tubes improve exhaust scavenging
- 304 stainless steel construction with CNC-machined flanges
- Engineered and tested by aFe POWER
- Direct-fit replacement requiring no permanent modification
Specifications
- Brand: aFe POWER
- Manufacturer Part Number: 48-34139
- SKU: afe48-34139
- Product Line: Twisted Steel
- Part Type: Exhaust Header
- Engine Code: LML
Always verify aFe POWER part number 48-34139 against your vehicle's year, engine, and configuration before ordering.
Shipping Height: 13.0
Shipping Length: 49.0
Shipping Width: 23.0