aFe

aFe Twisted Steel 304 SS Performance Package 2011-2015 GM 6.6L Duramax LML

SKU: afe48-34139 UPC: 802959483237
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Expected ship time: usually within 24–48 hours; some vendor items may take longer.

Call: (503) 235-1947 | Email Us: info@dfispdx.com

$2,593.00
-20% $3,241.25 $2,593.00
New
Heavy & 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.

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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

The up-pipes and down-pipe are constructed out of 2" and 3" mandrel-bent 304 brush finished stainless steel tubing. This aFe Twisted Steel 304 SS Performance Package is listed for the 2011-2015 Silverado/Sierra HD 6.6L Duramax LML.

Key Features

  • 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 drivers 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.

Fitment

  • 2011-2015 Silverado/Sierra HD 6.6L Duramax LML
  • Vendor application: GM Diesel Trucks 11-15 V8-6.6L (td) LML

Product Details

  • Brand: aFe POWER
  • Manufacturer Part Number: 48-34139
  • Product Line: Twisted Steel
  • Product Type: Header & Connection Pipe Combo
  • Emissions: Not CARB exempt; not legal for sale or use on pollution-controlled vehicles in California

Orders typically ship within 24–48 hours of being received, but because of vendor shipping times some orders may take longer. We ship within the United States only (48 contiguous states plus DC).

Shipping Height: 13.0

Shipping Length: 49.0

Shipping Width: 23.0
California Emissions (CARB)
Not legal for sale or use on pollution-controlled motor vehicles in California or other states that adopt California emissions standards. For off-road and competition use only.
California Proposition 65
WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer and/or reproductive harm. For more information, visit www.P65Warnings.ca.gov.