2004.5-2005 GM 2500HD/3500HD 6.6L LLY Duramax Single-Exit Kits

Upgrade your 2004.5-2005 GM 6.6L truck with a high-quality single-exit exhaust system from Alligator Performance. Designed specifically for the GM 2500HD/3500HD, these aftermarket systems enhance performance while giving your 6.6L engine a bold, aggressive sound. Precision-built from durable, premium materials, these single-exit kits optimize airflow for noticeable power gains. Many options also feature aggressive-style tips to enhance your truck's look. Whether on the road or off-road, these exhaust systems will elevate your sound profile while reducing unwanted drone. After upgrading to a single exit DPF-back exhaust, check out our selection of Air Intakes for further air flow and performance improvements!  GM Duramax Fitments: 2004, 2005 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.

GM Duramax>2004.5-2005 6.6L LLY
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MagnaFlow 15789 Stainless 4 inch Cat-Back Exhaust | 2003-2007 GM Silverado/Sierra 2500HD
MagnaFlow 15789 Stainless 4 inch Cat-Back Exhaust | 2003-2007 GM Silverado/Sierra 2500HD

Magnaflow Exhaust Products

MagnaFlow 15789 Stainless 4 inch Cat-Back Exhaust | 2003-2007 GM Silverado/Sierra 2500HD

Price
$863
Banks 48633-B Monster Single Exhaust with Black Tip | 2002-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Crew with Extended Cab
Banks 48633-B Monster Single Exhaust with Black Tip | 2002-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Crew with Extended Cab

Banks Power

Banks 48633-B Monster Single Exhaust with Black Tip | 2002-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Crew with Extended Cab

Price
$540
Diamond Eye K4110S-RP 4 inch Stainless Steel Cat-Back Single Exit Straight Pipe No Tip Exhaust | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY
Diamond Eye K4110S-RP 4 inch Stainless Steel Cat-Back Single Exit Straight Pipe No Tip Exhaust | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Diamond Eye Performance

Diamond Eye K4110S-RP 4 inch Stainless Steel Cat-Back Single Exit Straight Pipe No Tip Exhaust | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Sale price
$404.95
Regular price
$464.23
Diamond Eye K4110S 4 inch Stainless Steel Cat-Back Single Exit No Tip Exhaust | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY
Diamond Eye K4110S 4 inch Stainless Steel Cat-Back Single Exit No Tip Exhaust | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Diamond Eye Performance

Diamond Eye K4110S 4 inch Stainless Steel Cat-Back Single Exit No Tip Exhaust | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Sale price
$459.95
Regular price
$534.44
Diamond Eye K4110A-RP 4 inch Aluminized Cat-Back Single Exit Straight Pipe No Tip Exhaust | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY
Diamond Eye K4110A-RP 4 inch Aluminized Cat-Back Single Exit Straight Pipe No Tip Exhaust | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Diamond Eye Performance

Diamond Eye K4110A-RP 4 inch Aluminized Cat-Back Single Exit Straight Pipe No Tip Exhaust | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Sale price
$334.95
Regular price
$379.82
Diamond Eye K4110A 4 inch Aluminized Cat-Back Single Exit No Tip Exhaust | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY
Diamond Eye K4110A 4 inch Aluminized Cat-Back Single Exit No Tip Exhaust | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Diamond Eye Performance

Diamond Eye K4110A 4 inch Aluminized Cat-Back Single Exit No Tip Exhaust | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Sale price
$389
Regular price
$447.77
MBRP S6000P 4 inch Cat Back Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
MBRP S6000P 4 inch Cat Back Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

MBRP Exhaust

MBRP S6000P 4 inch Cat Back Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Price
$439.99
MBRP S6000AL 4 inch Cat Back Aluminized Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
MBRP S6000AL 4 inch Cat Back Aluminized Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

MBRP Exhaust

MBRP S6000AL 4 inch Cat Back Aluminized Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Price
$549.99
Banks 48770 Monster Sport Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Crew with Extended Cab Short Bed
Banks 48770 Monster Sport Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Crew with Extended Cab Short Bed

Banks Power

Banks 48770 Monster Sport Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Crew with Extended Cab Short Bed

Price
$449
Banks 48769 Monster Sport Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Standard Cab Long Bed
Banks 48769 Monster Sport Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Standard Cab Long Bed

Banks Power

Banks 48769 Monster Sport Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Standard Cab Long Bed

Price
$429
Banks 48771 Monster Sport Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Crew with Extended Cab Long Bed
Banks 48771 Monster Sport Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Crew with Extended Cab Long Bed

Banks Power

Banks 48771 Monster Sport Exhaust System | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Crew with Extended Cab Long Bed

Price
$489
Banks 48634 Monster Single Exhaust with Chrome Tip | 2002-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Crew with Extended Cab
Banks 48634 Monster Single Exhaust with Chrome Tip | 2002-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Crew with Extended Cab

Banks Power

Banks 48634 Monster Single Exhaust with Chrome Tip | 2002-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax Crew with Extended Cab

Price
$599

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2004.5-2005 6.6L Silverado & Sierra 2500HD/3500HD

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