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  • Legal in California Only for Racing Vehicles, May Never be Used Upon Highway.
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Product Details

aFe Accessories

Atlas™ Aluminized Steel Downpipe-Back Exhaust System (49-04035NM) by aFe®. Without Muffler and Tip. Exhaust Type: Downpipe-Back. Exhaust Tubing Material: Aluminized Steel. Main Tubing Diameter: 5". Exhaust System Sound: Aggressive / Loud. The ATLAS Exhaust System channels the exhaust from the engine to the rear of the vehicle on a racing diesel engine truck. It has the least amount of exhaust flow restriction possible to enable the engine to make more horsepower and torque and operate with reduced exhaust gas temperatures.

Notes: Legal in California Only for Racing Vehicles, May Never be Used Upon Highway.

aFe FAQsaFe - WarrantyaFe About

Specifications:

Exhaust Type: Downpipe-Back
Exhaust Tubing Material: Aluminized Steel
Exit Location: Single Passenger Side
Main Tubing Diameter: 5"
Exhaust System Sound: Aggressive / Loud

Features:

  • The least restriction for maximum airflow
  • Adds up to 29% Increased Flow, +15 HP, +31 lbs x ft. Torque Gain
  • Aggressive Sound
  • Improves performance
  • Reduces exhaust gas temperature
  • Flow bench and dyno tested
  • Tubes mandrel-bent
  • Aluminized for durability
  • Welded hangers with swaged ends
  • Slotted and swedged ends
  • Premium quality band clamps
  • Backed by a 2-year limited warranty
  • Proudly made in the USA

Includes:

  • 2 pc. Tailpipe
  • Hangers
  • Clamps

An off-road exhaust system must safely carry harmful exhaust gases to the rear of the vehicle, away from the driver. But it must do so with the least amount of restriction, for maximum airflow and power, under the most demanding conditions. To achieve this, the right pipe size and every bend must be carefully calculated.

aFe tests its systems on the flow bench and the dynamometer to determine the right pipe size and muffler construction. Then they mandrel bend the pipes to ensure they maintain their shape and size throughout the entire length, to provide smooth, unrestricted airflow. Tubes that are not mandrel bent can lose up to 20% of their diameter in sharp bends. A free-flowing 12" wide muffler is included in systems that feature a muffler. Some systems include a straight muffler delete pipe if a more aggressive sound and maximum flow is desired.

But performance is only part of the equation. A quality exhaust system should be easy to install and made to last. The muffler and all pipes of the ATLAS exhaust system are constructed from aluminized steel. To ensure a tight seal, slotted and swedged ends are used whenever possible. When used with the supplied premium quality band clamps, the tightest, leak-free seal is the result. Every hanger is thoroughly welded on each side to ensure a strong attachment and the hangers also feature swaged bayonet ends to lock in place once installed. The factory mounting locations are used throughout and a 2-piece tailpipe facilitates adjustment.

aFe® (Advanced Flow Engineering, Inc.) manufactures performance products for late model cars, light trucks and SUVs. The company was founded in 1999 with an initial concentration on high performance air filters. Since then, the company product line has broadened to include cold air intakes, fluid filters, exhaust systems, intake manifolds, intercoolers, programmers, differential covers, transmission pans and throttle body spacers. The team of engineers, machinists, production and sales people at aFe® have many years of experience in their respective positions, and together work to ensure they produce the best automotive products on the market.

Brand:
Part Number:
49-04035NM
UPC:
802959492451

Warranty Information

aFe warrants their products to be free from manufacturer's defects due to workmanship and material. This warranty applies only to the original purchaser of the product and is non-transferable. Proof of purchase of the aFe product is required for all warranty claims. Warranty is valid provided aFe instructions for installation and/or cleaning were properly followed. Proper maintenance with regular inspections of product is required to insure warranty coverage. Damage due to improper installation, abuse, unauthorized repair or alteration is not warranted. Incidental or consequential damages or cost, including installation and removal of part, incurred due to failure of aFe product is not covered under this warranty. All warranty is limited to the repair and/or replacement of the aFe part.

aFe OE replacement filters are warranted against manufacturer defects for as long as you own the vehicle and it is properly maintained using our filter cleaning kit.

  • aFe universal clamp on air filters and air intake kits are warranted against manufacturer defects for 2 years
  • aFe Diesel Fuel System are warranted against manufacturer defects for 2 years
  • aFe Sprint Booster are warranted against manufacturer defects for 3 years
  • aFe racing filters are warranted against manufacturer defects for 1 year
  • aFe Electronics (Tuners/Modules) are warranted against manufacture defects for 2 years. If the item has been opened, aFe will offer an exchange for the same product only
  • All warranty is contingent on proper installation and proper maintenance using our restore kit
  • All other aFe products such as exhaust systems, intake manifolds, turbo chargers, intercoolers and differential covers have a 2-year warranty
Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Vehicle Fitment

Chevy Silverado
2015 Chevy Silverado
  • 6.6L Regular Cab / Double Cab / Crew Cab 144.2" Wheelbase / 153.7" Wheelbase / 158.1" Wheelbase / 162.0" Wheelbase / 167.7" Wheelbase Manufactured Before July 2014 With Non-Flanged Downpipe
2014 Chevy Silverado
  • 6.6L Regular Cab / Crew Cab 153.7" Wheelbase / 162.0" Wheelbase / 163.7" Wheelbase / 167.7" Wheelbase
2013 Chevy Silverado
  • 6.6L Regular Cab / Extended Cab / Crew Cab 144.1" Wheelbase / 153.7" Wheelbase / 158.1" Wheelbase / 162.0" Wheelbase / 167.7" Wheelbase
2012 Chevy Silverado
  • 6.6L Regular Cab / Extended Cab / Crew Cab 144.1" Wheelbase / 153.7" Wheelbase / 158.1" Wheelbase / 162.0" Wheelbase / 167.7" Wheelbase
2011 Chevy Silverado
  • 6.6L Regular Cab / Extended Cab / Crew Cab 144.1" Wheelbase / 153.7" Wheelbase / 158.1" Wheelbase / 162.0" Wheelbase / 167.7" Wheelbase
GMC Sierra
2015 GMC Sierra
  • 6.6L Regular Cab / Double Cab / Crew Cab 144.2" Wheelbase / 153.7" Wheelbase / 158.1" Wheelbase / 162.0" Wheelbase / 167.7" Wheelbase Manufactured Before July 2014 With Non-Flanged Downpipe
2015 GMC Sierra
  • 6.6L Regular Cab / Double Cab / Crew Cab 144.2" Wheelbase / 153.7" Wheelbase / 158.1" Wheelbase / 162.0" Wheelbase / 167.7" Wheelbase
  • Fits Models Manufactured Before July 2014
  • Fits Models with Non-Flanged Downpipe
2014 GMC Sierra
  • 6.6L Regular Cab / Crew Cab 153.7" Wheelbase / 162.0" Wheelbase / 167.7" Wheelbase
2013 GMC Sierra
  • 6.6L Regular Cab / Extended Cab / Crew Cab 144.1" Wheelbase / 153.7" Wheelbase / 158.1" Wheelbase / 162.0" Wheelbase / 167.7" Wheelbase
2012 GMC Sierra
  • 6.6L Regular Cab / Extended Cab / Crew Cab 144.1" Wheelbase / 153.7" Wheelbase / 158.1" Wheelbase / 162.0" Wheelbase / 167.7" Wheelbase
2011 GMC Sierra
  • 6.6L Regular Cab / Extended Cab / Crew Cab 144.1" Wheelbase / 153.7" Wheelbase / 158.1" Wheelbase / 162.0" Wheelbase / 167.7" Wheelbase
GMC Sierra Denali
2015 GMC Sierra Denali
  • 6.6L Manufactured Before July 2014 With Non-Flanged Downpipe
2014 GMC Sierra Denali
  • 6.6L
2013 GMC Sierra Denali
  • 6.6L
2012 GMC Sierra Denali
  • 6.6L
2011 GMC Sierra Denali
  • 6.6L
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