Products Showing Parts for — {{ }}

No Results
Part #: AFE

AFE 49-440XX 5" MACH Force XP Race Exhaust System

2011-2016 GM 6.6L Duramax LML (ECLB, CCSB & CCLB Configurations Only - Does not fit ECSB)
Part #: AFE
$469.40 FROM 527.25
Our Recommendations Compatible Products
Scroll to View More


The AFE 49-440XX MACH Force XP 5" Race Exhaust System for your 2011-2016 GM 6.6L Duramax iis engineered to perform in the most extreme environments. This system is constructed from mandrel bent 5" T409 stainless steel tubing for maximum flow, increased horsepower, increased torque and lower EGTs. MACH Force XP exhaust systems are the perfect combination of performance, fit and value.

  • 5 Stainless Steel Construction
  • Off-Road, Race Exhaust System
  • Includes Hardware, Hangers & Clamps For Install

System Options
With Muffler (Black Tip) 49-44029-B                    
With Muffler (Polished Tip) 49-44029-P            
Without Muffler 49-44030

Warning: This free-flow race exhaust system requires the use of an aftermarket performance programmer with off-road tuning.


  • Manufacturer NameAFE
  • Shipping Weight74.00 lb.
  • Shipping Length14 in.
  • Shipping Width60 in.
  • Shipping Height19 in.


Be the first to rate this item!

Write Review

Customer Photos

Customer Photos

See what others built Submit your photo

Submit a photo for this product and get a $10 XDP Gift Card for approved images the entire month of February - Limit one per customer. Ends 2/28.

Questions and Answers

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

Most Popular Questions

Who makes a DPF delete electronics box?
View Staff Answer 

We no longer offer a DPF “off road” programmer for the 11-12 6.6L being the manufactures have discontinued the products.

What does this mean? "Does not fit ECSB." I'm not sure what it refers to here.
View Staff Answer 
This exhaust system requires the removal of emissions equipment which directly voids your warranty.

The acronyms are as follows:

SCSB - Single Cab, Short Bed
SCLB - Single Cab, Long Bed
ECSB - Extended Cab, Short Bed
ECLB - Extended Cab, Long Bed
CCSB - Crew Cab, Short Bed
CCLB - Crew Cab, Long Bed
MCSB - Mega Cab, Short Bed
C&C - Cab and Chassis

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


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 - 2/19/18 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.