Norcal Diesel Performance - 6.6L LLY Exhaust Parts

2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts

Elevate your GM 6.6L LLY Duramax engine's performance with our premium LLY exhaust parts. Whether you're looking to replace worn-out components or upgrade for better efficiency, our selection has you covered. Check out the 3-inch 304 Stainless Steel Down Pipe for improved exhaust flow and the BD Diesel Exhaust Brake for enhanced braking performance. Each LLY exhaust part is designed for durability and optimal performance. Don't settle for less, invest in quality parts and experience the difference. Shop now and enjoy fast shipping and expert installation services.

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2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - Exhaust Systems
Exhaust Systems
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - Exhaust Tips & Stacks
Exhaust Tips & Stacks

6.6L LLY Exhaust Parts Featured Products

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Items 1-23 of 23
PPE Diesel - 3 Inch 304 Stainless Steel Down Pipe GM 6.6L 04.5-10 PPE Diesel
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - PPE Diesel - 3 Inch 304 Stainless Steel Down Pipe GM 6.6L 04.5-10 PPE Diesel
3 Inch 304 Stainless Steel Down Pipe GM 6.6L 04.5-10 PPE Diesel
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Description: Stainless Steel Performance Downpipe CA LEGAL CARB EO# D-701-21 Fits 2004.5-2010 GM Duramax 6.6L Diesel, LLY, LBZ, LMM
Condition: New
Price: $149.99
Sale: $134.99
Save: 10%
Save: $15.00

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Alliant Power - Alliant Power AP0128 LLY Duramax Injection Pump/EGR (HPFP/EGR) Valve Installation Kit
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - Alliant Power - Alliant Power AP0128 LLY Duramax Injection Pump/EGR (HPFP/EGR) Valve Installation Kit
Alliant Power AP0128 LLY Duramax Injection Pump/EGR (HPFP/EGR) Valve Installation Kit
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Description: High Pressure Fuel Pump / Injection Pump / EGR Valve Install Gasket Kit Fits 2004.5-2005 GM Duramax Diesel 6.6L LLY
Condition: New
Alliant Power:12
Price: $53.90

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BD Diesel - BD Diesel Exhaust Brake - 2001-2010 Duramax 6.6L w/4in Exh 1024311
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - BD Diesel - BD Diesel Exhaust Brake - 2001-2010 Duramax 6.6L w/4in Exh 1024311
BD Diesel Exhaust Brake - 2001-2010 Duramax 6.6L w/4in Exh 1024311
Exhaust Brake
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Description: Exhaust Brake - 2001-2010 Duramax 6.6L w/4in Exh
Condition: New
Limited Supply: Only 0 Left!
N/A
Price: $1,640.95

BD Diesel - BD Diesel Exhaust Brake - 2001-2010 Duramax 6.6L w/Stock Exhaust
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - BD Diesel - BD Diesel Exhaust Brake - 2001-2010 Duramax 6.6L w/Stock Exhaust
BD Diesel Exhaust Brake - 2001-2010 Duramax 6.6L w/Stock Exhaust
Exhaust Brake
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Description: Exhaust Brake - 2001-2010 Duramax 6.6L w/Sock Exhaust
Condition: New
Limited Supply: Only 0 Left!
Nevada:1
Price: $1,640.95

BD Diesel - BD Diesel Manifold, Exhaust - 2001-2010 Duramax 1041460
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - BD Diesel - BD Diesel Manifold, Exhaust - 2001-2010 Duramax 1041460
BD Diesel Manifold, Exhaust - 2001-2010 Duramax 1041460
Exhaust Manifold
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Description: Manifold, Exhaust - 2001-2010 Duramax
Condition: New
Limited Supply: Only 7 Left!
Kentucky:2 Texas:2 Indiana:1
Price: $196.95

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BD Diesel - BD Diesel Push/Pull Switch Kit, Exhaust Brake - 3/4in Manual Lever 1300240
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - BD Diesel - BD Diesel Push/Pull Switch Kit, Exhaust Brake - 3/4in Manual Lever 1300240
BD Diesel Push/Pull Switch Kit, Exhaust Brake - 3/4in Manual Lever 1300240
Push / Pull Switch
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Description: Push/Pull Switch Kit, Exhaust Brake - 3/4in Manual Lever
Condition: New
Limited Supply: Only 2 Left!
Kentucky:1
Price: $80.95

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PPE Diesel - Bolt Set For PPE Manifolds M10-1.50X35 PPE Diesel
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - PPE Diesel - Bolt Set For PPE Manifolds M10-1.50X35 PPE Diesel
Bolt Set For PPE Manifolds M10-1.50X35 PPE Diesel
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Description: CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Condition: New
Limited Supply: Only 0 Left!
Price: $19.99
Sale: $17.99
Save: 10%
Save: $2.00
Banks Power - Brake Exhaust Braking System w/Switch 04-05 Chevy 6.6L LLY Banks Power
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - Banks Power - Brake Exhaust Braking System w/Switch 04-05 Chevy 6.6L LLY Banks Power
Brake Exhaust Braking System w/Switch 04-05 Chevy 6.6L LLY Banks Power
Diesel Engine Brake
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Description: Fits 2004-2005 Chevy / GMC 2500 & 3500 Duramax 6.6L LLY Diesel
Condition: New
Limited Supply: Only 4 Left!
Pennsylvania:1 Texas:1 Indiana:1
Price: $619.00

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Diamond Eye Performance - Diamond Eye Performance 2001-EARLY 2007 CHEVY/GMC 6.6L DIESEL 2500/3500 (ALL CAB AND BED LENGTHS)-PERFOR 362005
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - Diamond Eye Performance - Diamond Eye Performance 2001-EARLY 2007 CHEVY/GMC 6.6L DIESEL 2500/3500 (ALL CAB AND BED LENGTHS)-PERFOR 362005
Diamond Eye Performance 2001-EARLY 2007 CHEVY/GMC 6.6L DIESEL 2500/3500 (ALL CAB AND BED LENGTHS)-PERFOR 362005
Exhaust Tail Pipe
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Description: Exhaust Tail Pipe, 2001-EARLY 2007 CHEVY/GMC 6.6L DIESEL 2500/3500 (ALL CAB AND BED LENGTHS)-PERFOR
Condition: New
Limited Supply: Only 0 Left!
N/A
Price: $110.46

Diamond Eye Performance - Diamond Eye Performance 2004-2010 CHEVY/GMC 6.6L LLY; LBZ; LMM DURAMAX 2500/3500 (ALL CAB AND BED LENGTHS)
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - Diamond Eye Performance - Diamond Eye Performance 2004-2010 CHEVY/GMC 6.6L LLY; LBZ; LMM DURAMAX 2500/3500 (ALL CAB AND BED LENGTHS)
Diamond Eye Performance 2004-2010 CHEVY/GMC 6.6L LLY; LBZ; LMM DURAMAX 2500/3500 (ALL CAB AND BED LENGTHS)
Exhaust Pipe
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Description: Exhaust Pipe, 2004-2010 CHEVY/GMC 6.6L LLY; LBZ; LMM DURAMAX 2500/3500 (ALL CAB AND BED LENGTH
Condition: New
Limited Supply: Only 7 Left!
Kentucky:1 Texas:4
Price: $220.23

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PPE Diesel - Down-Pipe Support Bracket PPE Diesel
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - PPE Diesel - Down-Pipe Support Bracket PPE Diesel
Down-Pipe Support Bracket PPE Diesel
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Description: CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Condition: New
Limited Supply: Only 0 Left!
Price: $24.99
Sale: $22.49
Save: 10%
Save: $2.50
PPE Diesel - Heat Shield Blanket PPE Manifold Left/Right PPE Diesel
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - PPE Diesel - Heat Shield Blanket PPE Manifold Left/Right PPE Diesel
Heat Shield Blanket PPE Manifold Left/Right PPE Diesel
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Description: CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Condition: New
Price: $279.99
Sale: $251.99
Save: 10%
Save: $28.00

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XDP Xtreme Diesel Performance - High-Flow Exhaust Manifold Driver Side 6.6 Duramax - XD342 XDP
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - XDP Xtreme Diesel Performance - High-Flow Exhaust Manifold Driver Side 6.6 Duramax - XD342 XDP
High-Flow Exhaust Manifold Driver Side 6.6 Duramax - XD342 XDP
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Condition: New
Price: $118.30
Sale: $88.95
Save: 25%
Save: $29.35

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PPE Diesel - Manifolds And Up-Pipes GM 04.5-05 Fed Y-Pipe LLY PPE Diesel
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - PPE Diesel - Manifolds And Up-Pipes GM 04.5-05 Fed Y-Pipe LLY PPE Diesel
Manifolds And Up-Pipes GM 04.5-05 Fed Y-Pipe LLY PPE Diesel
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Description: 50 States Emissions Legal (E.O. D-701-19)
Condition: New
Price: $1,245.99
Sale: $1,121.39
Save: 10%
Save: $124.60

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DMAXSTORE - MAX-Flow 3" Duramax Diesel Downpipe - 2004.5-2010 GM 6.6L
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - DMAXSTORE - MAX-Flow 3" Duramax Diesel Downpipe - 2004.5-2010 GM 6.6L
MAX-Flow 3" Duramax Diesel Downpipe - 2004.5-2010 GM 6.6L
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Description: MAX-FLOW 3" DURAMAX DOWNPIPE, 2004.5-2010 GM 6.6L NOT LEGAL FOR SALE IN CALIFORNIA
Condition: New
Price: $149.95

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MBRP Exhaust - MBRP Exhaust 3" Down Pipe
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - MBRP Exhaust - MBRP Exhaust 3" Down Pipe
MBRP Exhaust 3" Down Pipe
3" Turbo Down Pipe
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Description: MBRP Performance Exhaust 3" Down Pipe
Condition: New
Pennsylvania:16 Nevada:11 Indiana:12
Price: $229.99

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MBRP Exhaust - MBRP Exhaust 3" Down Pipe - Carb EO # D-763
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - MBRP Exhaust - MBRP Exhaust 3" Down Pipe - Carb EO # D-763
MBRP Exhaust 3" Down Pipe - Carb EO # D-763
50 State Legal Down Pipe
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Description: MBRP Performance Exhaust 3" Down Pipe - Carb EO # D-763
Condition: New
Limited Supply: Only 7 Left!
Texas:2 Indiana:5
Price: $224.99

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MBRP Exhaust - MBRP Exhaust 4 Regular Cab Adaptor, AL GMAL413
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - MBRP Exhaust - MBRP Exhaust 4 Regular Cab Adaptor, AL GMAL413
MBRP Exhaust 4 Regular Cab Adaptor, AL GMAL413
Step Nerf Bar
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Description: For use with MBRP item #'s S6000AL and S6002AL to adapt these systems to be used on a regular cab truck. 4 Regular Cab Adaptor, AL
Condition: New
Limited Supply: Only 3 Left!
Texas:1 Pennsylvania:1 Indiana:2
Price: $109.99

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MBRP Exhaust - MBRP Exhaust Dual Stack Pipe Kit, AL - UT2001
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - MBRP Exhaust - MBRP Exhaust Dual Stack Pipe Kit, AL - UT2001
MBRP Exhaust Dual Stack Pipe Kit, AL - UT2001
Exhaust System Kit
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Description: MBRP Performance Exhaust Full size Pickup "T" pipe kit, AL Dual Stack T-Pipe Kit
Condition: New
Limited Supply: Only 7 Left!
Kentucky:1 Pennsylvania:4 Nevada:1 Indiana:1
Price: $439.99

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PPE Diesel - Oem Length Up-Pipes 04.5-05 EGR PPE Diesel
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - PPE Diesel - Oem Length Up-Pipes 04.5-05 EGR PPE Diesel
Oem Length Up-Pipes 04.5-05 EGR PPE Diesel
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Description: CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Condition: New
Price: $499.99
Sale: $449.99
Save: 10%
Save: $50.00

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Sinister Diesel - Sinister Diesel Driver Side Up-Pipe for GM Duramax 2001-2010 6.6L
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - Sinister Diesel - Sinister Diesel Driver Side Up-Pipe for GM Duramax 2001-2010 6.6L
Sinister Diesel Driver Side Up-Pipe for GM Duramax 2001-2010 6.6L
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Condition: New
Not Available

Spoologic - SPOOLOGIC Driver Side Exhaust Manifold Upgrade NO PINCH For 01-15 GMC Chevrolet Duramax
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - Spoologic - SPOOLOGIC Driver Side Exhaust Manifold Upgrade NO PINCH For 01-15 GMC Chevrolet Duramax
SPOOLOGIC Driver Side Exhaust Manifold Upgrade NO PINCH For 01-15 GMC Chevrolet Duramax
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Description: SPOOLOGIC Driver Side Exhaust Manifold Upgrade NO PINCH Fits 01-15 GMC Chevrolet Duramax Diesel 6.6L
Condition: New
Price: $99.95

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TrackTech Fasteners - TrackTech Up-Pipe Bolts + Washers for 01-16 LB7 LLY LBZ LMM LML Duramax
2004.5-2005 GM 6.6L LLY Duramax - 6.6L LLY Exhaust Parts - TrackTech Fasteners - TrackTech Up-Pipe Bolts + Washers for 01-16 LB7 LLY LBZ LMM LML Duramax
TrackTech Up-Pipe Bolts + Washers for 01-16 LB7 LLY LBZ LMM LML Duramax
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Description: TrackTech Up-Pipe Bolts + Washers for 01-16 LB7 LLY LBZ LMM LML Duramax
Condition: New
Price: $79.91
Sale: $66.58
Save: 17%
Save: $13.33

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Items 1-23 of 23

More About 6.6L LLY Exhaust Parts

2004–2005 Duramax LLY Exhaust Parts

2004 to 2005 Duramax engines have a lot going for them in terms of power, but that doesn’t mean you can’t make small changes to maximize performance. Duramax LLY exhaust parts can help your engine use fuel more efficiently and even give you some extra horsepower for your effort. If you know that your truck isn’t operating at peak efficiency, this can feel frustrating. Don’t let yourself settle for what you drove off the sale lot with. Check out some of these Duramax LLY exhaust parts to find what you need for optimal performance in your own truck. This kind of upgrade can make a world of difference regarding your truck’s longevity and performance.