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2011-2015 6.6L LML GM Duramax Exhaust Kits

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.  If you’re having trouble determining the best route for your exhaust system or components, feel free to give us a call and we’d be happy to steer you in the right direction.




AFE Atlas Downpipe Back Dual Exhaust 11-14 6.6L LML Duramax
AFE ATLAS 4" Aluminized Downpipe Back Dual Exhaust 11-14 6.6L LML Duramax
Price: $599.00 
SKU: AFE-
AFE ATLAS 4
AFE ATLAS 4" Down Pipe Back Aluminized Exhaust Kit 11-13 GM Duramax
Price: $329.00 
SKU: AFE-
AFE 5
AFE ATLAS 5" Aluminized DPF Back Exhaust 11-13 6.6L LML GM Duramax
Price: $399.00 
SKU: AFE-
AFE Power MACH Force XP Cat-Back Exhaust System 2011-12 GM LML
AFE MACH Force XP 4" Cat-Back DPF Delete Stainless Exhaust 11-13 LML GM Duramax
Price: $574.00 
SKU: AFE-49-44025
AFE MACH Force XP 4
AFE MACH Force XP 4" Cat-Back Stainless Exhaust 11-13 LML GM Duramax
Price: $424.00 
SKU: AFE-49-44026
AFE MACH Force XP 4
AFE MACH Force XP 4" Stainless Down Pipe Back Exhaust NO MUFFLER 11-13 LML GM Duramax
Price: $449.00 
SKU: AFE-49-44031
AFE Power MACHForce GM 2011-12 6.6L LML XP Turbo-Back SS-409 Exhaust
AFE MACH Force XP 4" Stainless Down Pipe Back Exhaust WITH MUFFLER 11-13 LML GM Duramax
Price: $599.00 
SKU: AFE-49-44032
AFE MACH Force XP Downpipe Back Dual Exhaust 11-14 6.6L LML Duramax
AFE MACH Force XP 4" Stainless Downpipe Back Dual Exhaust 11-14 6.6L LML Duramax
Price: $699.00 
SKU: AFE-
AFE MACH Force XP 4
AFE MACH Force XP 4" Stainless Race Pipe 11-13 LML Duramax
Price: $250.00 
SKU: AFE-49-44027
AFE Power Down-Pipe Back Exhaust Kit 2011-12 GM Duramax
AFE MACH Force XP 5" Down-Pipe Back Stainless Exhaust 11-13 GM Duramax
Price: $699.00 
SKU: AFE-
AFE Power MACHForce GM 2011-12 6.6L XP Cat-Back SS-409
AFE MACH Force XP 5" Stainless Cat Back Exhaust NO TIP 11-13 LML GM Duramax
Price: $549.00 
SKU: AFE-49-44030
AFE 5
AFE MACH Force XP 5" Stainless DPF Back Exhaust 11-13 LML GM Duramax
Price: $499.00 
SKU: AFE-
AFE MACH Force XP 4
AFE MACH Force XP 5" Stainless Steel Cat Back Exhaust WITH TIP 11-13 LML GM Duramax
Price: $759.00 
SKU: AFE-
Banks Monster Exhaust 2011 6.6L Chevy/GMC Duramax LML
Banks Monster Exhaust 2011 6.6L Chevy/GMC Duramax LML 47786
Price: $338.87 
SKU: BAN-47786
Diamond Eye 4 DPF Back Exhaust 11-14 LML Duramax
Diamond Eye 4" DPF Back Exhaust 11-14 LML Duramax
Price: $215.73 
SKU: DE-
Diamond Eye 4
Diamond Eye 4" DPF Back Turn Down Exhaust Kit 11-13 LML Duramax
Price: $215.72 
SKU: DE-K4156
Diamond Eye 4
Diamond Eye 4" Turbo Direct Pipe Back Single Outlet Exhaust 11-14 LML 6.6L GM Duramax
Price: $335.94 
SKU: DE-
Diamond Eye 4
Diamond Eye 4" Turbo Direct Pipe Back Single Outlet Exhaust WITH Quiet Tone Resonator 11-14 LML Duramax
Price: $370.40 
SKU: DE-
Diamond Eye 5
Diamond Eye 5" DPF Back Exhaust 11-13 LML 6.6L GM Duramax
Price: $323.25 
SKU: DE-
Diamond Eye 5
Diamond Eye 5" Turbo Direct Pipe Back Single 2011-14 LML 6.6L GM Duramax
Price: $379.01 
SKU: DE-
Diamond Eye 5
Diamond Eye 5" Turbo Direct Pipe Back Single WITH QUIET TONE 2011-14 LML 6.6L GM Duramax
Price: $435.86 
SKU: DE-
Diamond Eye 5
Diamond Eye 5" Universal Aluminized Stack Kit
Price: $381.74 
SKU: DE-150100
Diamond Eye 5
Diamond Eye Billet Aluminum Stack Clamps
Price: $118.24 
SKU:
FLO~PRO 2011 GM Duramax 4
FLO~PRO 4" Cat Back DPF Delete Duals No Muffler NO Bungs Off-Road 11-15 LML GM Duramax
Price: $550.00 
SKU: FLO-761
FLO~PRO 2011 Duramax CAT DPF Delete Pipe
FLO~PRO 4" CAT DPF Delete Pipe 11-15 LML GM Duramax
Price: $275.00 
SKU: FLO-
FLO~PRO 5
FLO~PRO 5" Downpipe Back Dual Exhaust 11-15 6.6L LML Duramax
Price: $780.00 
SKU: FLO-764
FLO~PRO 2011-15 GM Duramax Cat Back 4
FLO~PRO Cat Back DPF Delete 4" Single Exhaust Kit No Bungs 11-15 LML GM Duramax
Price: $374.00 
SKU: FLO-
FLO~PRO 2011 GM Duramax Downpipe Back 5
FLO~PRO Cat Back DPF Delete 5" Single Exhaust Kit No Bungs 11-15 LML GM Duramax
Price: $528.00 
SKU: FLO-
FLO~PRO Downpipe Back DPF Delete 4
FLO~PRO Downpipe Back DPF Delete 4" Single Exhaust Kit No Bungs 11-15 LML GM Duramax
Price: $380.00 
SKU: FLO-
FLO~PRO 2011-15 GM Duramax Downpipe Back 5
FLO~PRO Downpipe Back DPF Delete 5" Single Exhaust Kit No Bungs 11-13 LML GM Duramax
Price: $520.00 
SKU: FLO-
Grand Rock Cab Back Complete Dual Stack Kit - 4
Grand Rock Build Your Own Cab Back Complete Dual Stack Kit
Price: $278.29 
SKU: GRANDROCK-
Grand Rock Cab Back Complete Dual Stack Kit - 4
Grand Rock Build Your Own Cab Back Complete Single Stack Kit
Price: $171.85 
SKU: GRANDROCK-
Magnaflow 4
Magnaflow 4" DPF Back Dual Outlet Pro Series Exhaust Kit 2015 6.6L LML GM Duramax
Price: $644.40 
SKU: MF-17857
Magnaflow 4
Magnaflow 4" DPF Back Single Outlet Aluminized Pro Exhaust Kit 11-13 6.6L LML GM Duramax
Price: $239.99 
SKU: MF-18908
Magnaflow 4
Magnaflow 4" DPF Back Single Outlet Black Series Exhaust Kit 11-13 6.6L LML GM Duramax
Price: $705.25 
SKU: MF-17024
Magnaflow 4
Magnaflow 4" DPF Back Single Outlet Black Series Exhaust Kit 2015 6.6L LML GM Duramax
Price: $541.44 
SKU: MF-17054
Magnaflow 4
Magnaflow 4" DPF Back Single Outlet Pro Series Exhaust Kit 11-13 6.6L LML GM Duramax
Price: $435.63 
SKU: MF-17908
Magnaflow 4
Magnaflow 4" DPF Back Single Outlet Pro Series Exhaust Kit 2014 6.6L LML GM Duramax
Price: $435.62 
SKU: MF-17854
Magnaflow 4
Magnaflow 4" DPF Back Single Outlet Pro Series Exhaust Kit 2015 6.6L LML GM Duramax
Price: $454.86 
SKU: MF-17855
Magnaflow 5
Magnaflow 5" DPF Back Single Outlet Aluminized Pro Exhaust Kit 11-13 6.6L LML GM Duramax
Price: $315.99 
SKU: MF-18910
Magnaflow 5
Magnaflow 5" DPF Back Single Outlet Aluminized Pro Exhaust Kit 2014 6.6L LML GM Duramax
Price: $365.55 
SKU: MF-18906
Magnaflow 5
Magnaflow 5" DPF Back Single Outlet Aluminized Pro Exhaust Kit 2015 6.6L LML GM Duramax
Price: $384.79 
SKU: MF-18929
Magnaflow 5
Magnaflow 5" DPF Back Single Outlet Black Series Exhaust Kit 14-15 6.6L LML GM Duramax
Price: $546.77 
SKU: MF-17055
Magnaflow 5
Magnaflow 5" DPF Back Single Outlet Pro Series Exhaust Kit 11-13 6.6L LML GM Duramax
Price: $440.95 
SKU: MF-17910
Magnaflow 4
Magnaflow 5" DPF Back Single Outlet Pro Series Exhaust Kit 2014 6.6L LML GM Duramax
Price: $440.95 
SKU: MF-17853
Magnaflow 4
Magnaflow 5" DPF Back Single Outlet Pro Series Exhaust Kit 2015 6.6L LML GM Duramax
Price: $460.19 
SKU: MF-17856
Magnaflow Aluminized Pro Series 4
Magnaflow Aluminized Pro Series 4" DPF Back Dual Outlet Exhaust System 11-13 6.6L LML GM Duramax
Price: $429.99 
SKU: MF-18995
Magnaflow Aluminized Pro Series 4
Magnaflow Aluminized Pro Series 4" DPF Back Dual Outlet Exhaust System 2014 6.6L LML GM Duramax
Price: $500.23 
SKU: MF-18930
Magnaflow Aluminized Pro Series 4
Magnaflow Aluminized Pro Series 4" DPF Back Single Outlet Exhaust System 2014 6.6L LML GM Duramax
Price: $269.34 
SKU: MF-18905
Magnaflow Aluminized Pro Series 4
Magnaflow Aluminized Pro Series 4" DPF Back Single Outlet Exhaust System 2015 6.6L LML GM Duramax
Price: $288.58 
SKU: MF-18928
Magnaflow Black Series 4
Magnaflow Black Series 4" DPF Back Dual Outlet Exhaust System 11-13 6.6L LML GM Duramax
Price: $923.38 
SKU: MF-17025
Magnaflow Black Series 4
Magnaflow Black Series 4" DPF Back Dual Outlet Exhaust System 14-15 6.6L LML GM Duramax
Price: $644.40 
SKU: MF-17056
Magnaflow Black Series 4
Magnaflow Black Series 4" DPF Back Single Outlet Exhaust System 2014 6.6L LML GM Duramax
Price: $647.53 
SKU: MF-17046
Magnaflow Pro Series 4
Magnaflow Pro Series 4" DPF Back Dual Outlet Exhaust System 11-13 6.6L LML GM Duramax
Price: $625.16 
SKU: MF-17995
MBRP 4
MBRP 4" DPF Back Dual Outlet Single Side Exhaust System 11-15 LML Duramax
Price: $364.99 
SKU: MBRP-
MBRP 4
MBRP 4" DPF-Back "Cool Duals" Exhaust 11-14 6.6L GM LML Duramax
Price: $494.99 
SKU: MBRP-S6034
MBRP 4
MBRP 4" DPF-Back Single Exhaust System 11-14 6.6L LML GM Duramax
Price: $259.99 
SKU: MBRP-S6032
MBRP 5
MBRP 5" DPF-Back Single Exhaust Systems 11-14 6.6L LML GM Duramax s6036
Price: $369.99 
SKU: MBRP-S6036
MBRP Black Series 4
MBRP Black Series 4" DPF Back Exhaust System 11-13 6.6L LML GM Duramax
Price: $348.31 
SKU: MBRP-S6032BLK
MBRP DPF Back and Turbo Down Pipe COMBO 11-13 LML Duramax
MBRP DPF Back and Turbo Down Pipe COMBO 11-13 LML Duramax
Price: $398.65 
SKU: MBRP-S6050
MBRP Single Stack Bed Kit - Universal UT4001 / UT3001
MBRP Smokers 4" Single Stack Bed Kit - Universal UT4001 / UT3001
Price: $219.99 
SKU:
MBRP Smokers Dual Stack System (DPF Back) 07.5+ 6.6L LMM/LML GM Duramax
MBRP Smokers Dual Stack System (DPF Back) 07.5+ 6.6L LMM/LML GM Duramax
Price: $561.15 
SKU: MBRP-