2011-2016 6.6L LML GM Duramax
Exhaust Kits | Exhaust Systems

With the release of the LML Duramax in 2011 model year applications came an entirely new exhaust system for GM.  This factory system starts out at 3.5" diameter out of the turbo and features a catalytic converter, followed by a DOC (Diesel Oxidation Catalyst), a DPF (Diesel Particulate Filter), and a DEF (Diesel Emissions Fluid) system.  Once the exhaust exits the last emissions device, the diameter is enlarged to a 4" diameter.  The previous LMM engines featured a similar exhaust system, but without the addition of the DEF, which is designed to further aid in the emissions cleaning process.  If you're looking to improve upon the power and efficiency of your Duramax, we can help you upgrade your exhaust with a higher flowing 4" or 5" system built from aluminized or stainless steel in single or dual outlet, or even stacks!  We carry exhaust systems from AFE, FLO~PRO, Diamond Eye, MBRP, Magnaflow, Silverline, and Grand Rock.

You can either search by manufacturer by selecting one of the categories below, or view our complete selection below.  If you’re having trouble determining the best route for your exhaust system or components, feel free to give us a call or send an e-mail to [email protected] and we’d be happy to steer you in the right direction.

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AFE 49-04035NM ATLAS 5" Downpipe Back Exhaust 11-15 Duramax LML
AFE-49-04035NM
Regular Price: $495.00
DPP Sale Price: $445.50
 
2011-2015 6.6L GM Duramax LML
AFE Atlas Downpipe Back Dual Exhaust 11-15 6.6L LML Duramax
AFE-
Regular Price: $795.00
On Sale Now: $715.50
2011-2015 6.6L GM Duramax LML
AFE ATLAS 4" Down Pipe Back Aluminized Exhaust Kit 11-15 GM Duramax
AFE-
Regular Price: $345.00
On Sale Now: $310.50
 
2011-2015 6.6L GM Duramax LML
AFE 5" DPF Back Atlas Series Exhaust 11-16 6.6L LML GM Duramax
AFE-
Regular Price: $375.00
On Sale Now: $337.50
AFE MACH Force XP 4" Cat-Back Stainless Exhaust 11-15 LML GM Duramax
AFE-49-44026NM
Regular Price: $415.00
On Sale Now: $373.50
2011-2015 6.6L GM Duramax LML
AFE MACH Force XP 4" Cat-Back Stainless Exhaust 11-15 Duramax
AFE-49-44025
Regular Price: $495.00
On Sale Now: $445.50
AFE MACH Force XP 4" Stainless Down Pipe Back Exhaust LML Duramax
AFE-49-44031NM
Regular Price: $515.00
On Sale Now: $463.50
2011-2015 6.6L GM Duramax LML
AFE MACH Force XP 4" Stainless Exhaust 11-15 LML GM Duramax
AFE-49-44032
Regular Price: $615.00
On Sale Now: $553.50
2011-2015 6.6L GM Duramax LML
AFE MACH Force XP 5" Down-Pipe Back Stainless Exhaust 11-15 Duramax
AFE-
Regular Price: $665.00
On Sale Now: $598.50
AFE Power MACHForce GM 2011-15 6.6L XP Cat-Back SS-409
AFE-49-44030NM
Regular Price: $499.00
On Sale Now: $449.10
2011-2015 6.6L GM Duramax LML
AFE 5" DPF Back Mach Force XP Series Exhaust 11-15 LML GM Duramax
AFE-
Regular Price: $499.00
On Sale Now: $449.10