Products Showing Parts for — {{ }}

No Results Showing Parts for — {{ }}
USD 595.5
Part #: AFE49-04007NM

AFE 49-04007NM ATLAS 5" Downpipe-Back Exhaust w/o Muffler

2001-2007 GM 6.6L Duramax LB7/LLY/LBZ
Part #: AFE49-04007NM
★★★★★ ★★★★★ 1 Reviews
Our Recommendations Compatible Products
Scroll to View More


A 5" from the down-pipe back, the ATLAS exhaust is engineered to perform in the most extreme environments. This system is constructed from mandrel bent 5" aluminized steel tubing for maximum flow, increased horsepower, increased torque and lower EGTs. This system is available in 5" down-pipe back without muffler. ATLAS exhaust systems are the perfect combination of performance, fit and value.

Installation is a Snap:
ATLAS exhaust systems utilize a 2-piece tailpipe design for a perfect fit by allowing adjustability at the tailpipe section. All systems use factory mounting locations providing stability and hassle-free installation.

Leak-Free Seal:
High quality OE style flange and band clamps are used for a complete 360 degree sealing surface.

Aggressive Sound:
A muffler eliminator pipe is used for a true race-inspired sound and maximum flow.

Perfect Fit:
OE style bayonet hangers are used to maintain a stable pipe location during high vibration and high heat conditions. The Bayonet tip holds the hanger bushing in place for an OE style fit that does not change with time.

Flow and Performance:
ATLAS exhaust systems are constructed of 5" mandrel bent aluminized steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGTs.

  • 5" Aluminized Steel Construction
  • Bayonet OE Style / Welded-On Hangers
  • Muffler Eliminator Pipe
  • Direct Bolt-On
  • Tip Not Included


  • MFG. Number 49-04007NM
  • Manufacturer Name AFE
  • Shipping Weight 81.00 lb.
  • Shipping Length 60 in.
  • Shipping Width 14 in.
  • Shipping Height 19 in.
  • Diameter 5"
  • Exhaust Exit Single
  • Exhaust Type Downpipe-Back
  • Material Aluminized Steel
  • UPC 802959491539
  • Warranty Yes
  • Warranty Info 2 Year
  • Prop 65 WARNING: Cancer & Reproductive Harm -


★★★★★ ★★★★★
4.0/5 Stars out of 1 Reviews
Good product
Matthew (Fallbrook ca) | December 31st, 2015
I found the hardest part from start to finish was the connect to the down pipe just have a friend makes it Easy this wayI did find one down side the pipes fit prefect or to the dot that u can get them to connect and had to use a pillars and carefully bent the connects out to fit over the starting pipes all the way back with a pre set champHowever this system is nasty it turns heads if u wanna be heard type deals.

Write a Review

Include Your Order Number For a Chance to Win a $100 Gift card

Overall Rating

Your Information

Email Address will not be made public.

Customer Photos

Customer Photos

See what others built Submit your photo

Questions and Answers

Ask XDP a Question about this product (Allow 24-48 hours for reply)

Most Popular Questions

By looking at the pic, is the front pipe diameter immedietly 5" after the flange? Or does it go from 4" to 5"? I've looked at the MBRP 5" downpipe back system and it looks like it doesn't expand to 5" until sometime after the connection flange. The pic of the AFE system shows no expansion, so is it 5" right away with no 4" to 5" increase?
View Staff Answer 

The AFE ATLAS 5" Aluminized Exhaust System w/o Muffler (Downpipe-Back) 49-04007NM flares to 5" directly after the downpipe flange.

Click Here to view the Installation Manual

Warranty is there a warranty on AFE #49-04007NM?
View Staff Answer 
The AFE ATLAS Aluminized Exhaust System has a 2-year warranty.
What other mods are needed, if any, for this exhaust to not damage any other motor components?
View Staff Answer 

An upgraded performance exhaust system can be installed on a completely stock truck. Performance exhaust systems increase exhaust flow by eliminating the restrictive stock muffler, replacing factory crimped bends with smooth mandrel bent tubing, and increasing the overall pipe diameter. The benefits of increased exhaust-flow are reduced EGT's (exhaust gas temperature), increased horsepower/torque, increased fuel mileage, and a that deep throaty diesel sound.

could i mount this exhaust up as a side pipe that exits in front of the right rear tire?
View Staff Answer 
The AFE ATLAS 5" Aluminized Exhaust System w/o Muffler (Downpipe-Back) 49-04007NM is designed for a traditional "out-the-rear" exit. Any other configuration would have to be custom fabricated and installed by the end user.

Enter the code at checkout and a 10% discount will be applied to your order.

USE CODE: 1492

Valid for all orders over the phone or online, *excluding the manufacturers listed in the company policy. You will still receive FREE SHIPPING on purchases over $50! This promotion is valid now - 10/14/19 only.

Emissions Notice

This product is not legal for sale or street use in California. Certain aftermarket products are subject to governmental emission standards regulated by the California Air Resources Board. In order for these products to be legal on a specific vehicle in California, the part number must receive a CARB Executive Order (EO) number. This number makes the part legal for use only on specific years, makes and models of vehicles. A decal with CARB EO number for these parts must be displayed in the engine bay to satisfy smog inspection requirements.