2004 - 2005 6.6L Duramax LLY

MBRP - Exhaust Tip - 4 Inch O.D. Dual Wall Angled 3.5 Inch Inlet 10 Inch Overall Length T5110 $94.99
MBRP - Exhaust Tip - 4 Inch O.D. Dual Wall Angled End - 2.5 Inch Inlet 8 Inch Overall Length T5123 $84.99
MBRP - Exhaust Tip - 4 Inch O.D. Dual Wall Angled Rolled End 3 Inch Inlet 8 Inch Overall Length T5122 $84.99
MBRP - Exhaust Tip - 4 Inch O.D. Turn Down 4 Inch Inlet 12 Inch Length T5081 $94.99
MBRP - Exhaust Tip - 4 Inch OD 2.5 Inch Inlet 12 Inch Length Angled Cut Rolled End Clampless No Weld T5150 $59.99
MBRP - Exhaust Tip - 4.5 Inch O.D. Dual Wall Angle Rolled End 2.5 Inch Inlet 11 Inch Length T5161 $94.99
MBRP - Exhaust Tip - 4.5 Inch O.D. Dual Wall Angled 3 Inch Inlet 7.7 Inch Length T5151 $84.99
MBRP - Exhaust Tip - 4.5 Inch O.D. Single Wall Angle Rolled End 2.5 Inch Inlet 11 Inch Length T5160 $79.99
MBRP - Exhaust Tip - 5 Inch O.D. Angled Rolled End 4 Inch Inlet 12 Inch Length T5051 $74.99
MBRP - Exhaust Tip - 5 Inch O.D. Angled Single Walled 4 Inch Inlet 12 Inch Length T5052 $79.99
MBRP - Exhaust Tip - 5 Inch O.D. Dual Wall Angled 4 Inch Inlet 12 Inch Length T5053 $104.99
MBRP - Exhaust Tip - 5 Inch O.D. Dual Wall Straight 4 Inch Inlet 12 Inch Length T5049 $104.99
MBRP - Exhaust Tip - 5 Inch O.D. Rolled End 4 Inch Inlet 18 Inch Length T5124 $124.99
MBRP - Exhaust Tip - 5 Inch O.D. Rolled Straight 4 Inch Inlet 12 Inch Length T5050 $84.99
MBRP - Exhaust Tip - 5 Inch O.D. Turn Down 4 Inch Inlet 14 Inch Length T5086 $124.99
MBRP - Exhaust Tip - 5 Inch O.D. Turn Down 5 Inch Inlet 14 Inch Length T5085 $109.99
MBRP - Exhaust Tip - 6 Inch O.D. Angled Rolled End 4 Inch Inlet 12 Inch Length T5073 $104.99
MBRP - Exhaust Tip - 6 Inch O.D. Angled Rolled End 5 Inch Inlet 12 Inch Length T5075 $104.99
MBRP - Exhaust Tip - 6 Inch O.D. Angled Rolled End 5 Inch Inlet 15 1/2 Inch Length 30 Degree Bend T5154 $164.99
MBRP - Exhaust Tip - 6 Inch O.D. Angled Rolled End 5 Inch Inlet 18 Inch Length T5125 $154.99
MBRP - Exhaust Tip - 6 Inch O.D. Dual Wall Angled 4 Inch Inlet 12 Inch Length T5072 $114.99
MBRP - Exhaust Tip - 6 Inch O.D. Dual Wall Angled 5 Inch Inlet 12 Inch Length T5074 $114.99
MBRP - Exhaust Tip - 6 Inch O.D. Rolled End 4 Inch Inlet 18 Inch Length T5130 $144.99
MBRP - Exhaust Tip - 7 Inch O.D. Rolled End 4 Inch Inlet 18 Inch Length T5126 $164.99
MBRP - Exhaust Tip - 7 Inch O.D. Rolled End 5 Inch Inlet 18 Inch Length T5127 $179.99
MBRP - Exhaust Tip - 8 Inch O.D. Rolled End 4 Inch Inlet 18 Inch Length T5128 $199.99
MBRP - Exhaust Tip - 8 Inch O.D. Rolled End 5 Inch Inlet 18 Inch Length T5129 $184.99
MBRP - Exhaust Tip - 8 x 2.5 Inch Rectangle 2.5 Inch O.D. Inlet 8.25 Inch Overall Length T5118 $119.99
MBRP - Exhaust Tip 4 Inch O.D. Angled Rolled End 2 3/4 Inch Inlet 10 Inch Length T5157 $69.99
MBRP - Exhaust Tip 4 Inch O.D. Dual Wall Angled 3 Inch Inlet 10 Inch Length T5156 $89.99
MBRP Black Series - 3 Inch Down Pipe - 2004.5-2010 Silverado/Sierra 6.6L Duramax GM8424 $234.99
MBRP Black Series - Exhaust Tip - 3.5 Inch O.D. Angled Rolled End 2 1/2 Inch Inlet 12 Inch Overall Length T5113BLK $84.99
MBRP Black Series - Exhaust Tip - 3.5 Inch O.D. Dual Wall Angled 2 1/2 Inch Inlet 12 Inch Overall Length T5106BLK $89.99
MBRP Black Series - Exhaust Tip - 3.75 Inch Oval 2.5 Inch Inlet 7 1/16 Inch Overall Length T5116BLK $94.99
MBRP Black Series - Exhaust Tip - 4 Inch O.D. Angled Rolled End 3.5 Inch Inlet 12 Inch Overall Length T5112BLK $89.99
MBRP Black Series - Exhaust Tip - 4 Inch O.D. Dual Wall Angled 3 Inch Inlet 10 Inch Length T5156BLK $124.99
MBRP Black Series - Exhaust Tip - 4 Inch O.D. Dual Wall Angled End 2.5 Inch Inlet 8 Inch Overall Length T5123BLK $119.99
MBRP Black Series - Exhaust Tip - 4 Inch O.D. Dual Wall Angled Rolled End 3 Inch Inlet 8 Inch Overall Length T5122BLK $114.99
MBRP Black Series - Exhaust Tip - 4 Inch OD 2.5 Inch Inlet 12 Inch Length Angled Cut Rolled End - Clampless-No Weld T5150BLK $89.99
MBRP Black Series - Exhaust Tip - 4.5 Inch O.D. Dual Wall Angled End 3 Inch Inlet 8 Inch Overall Length T5151BLK $109.99
MBRP Black Series - Exhaust Tip - 5 Inch O.D. Angled Rolled End 4 Inch Inlet 12 Inch Overall Length T5051BLK $99.99
MBRP Black Series - Exhaust Tip - 5 Inch O.D. Dual Wall Angled 4 Inch Inlet 12 Inch Overall Length T5053BLK $124.99
MBRP Black Series - Exhaust Tip - 5 Inch O.D. Rolled End 4 Inch Inlet 18 Inch Length T5124BLK $134.99
MBRP Black Series - Exhaust Tip - 6 Inch O.D. 5 Inch Inlet 15 1/2 Inch Length 30 Degree Bend Angled Rolled End T5154BLK $169.99
MBRP Black Series - Exhaust Tip - 6 Inch O.D. Angled Rolled End 5 Inch Inlet 12 Inch Overall Length T5075BLK $124.99
MBRP Black Series - Exhaust Tip - 6 Inch O.D. Angled Rolled End 5 Inch Inlet 18 Inch Length T5125BLK $169.99
MBRP Black Series - Exhaust Tip - 6 Inch O.D. Dual Wall Angled 5 Inch Inlet 12 Inch Overall Length T5074BLK $149.99
MBRP Black Series - Exhaust Tip - 6 Inch O.D. Rolled End 4 Inch Inlet 18 Inch Length T5130BLK $174.99
MBRP Black Series - Exhaust Tip - 7 Inch O.D. Rolled End 4 Inch Inlet 18 Inch Length Black Coated T5126BLK $184.99
MBRP Black Series - Exhaust Tip - 7 Inch O.D. Rolled End 5 Inch Inlet 18 Inch Length T5127BLK $189.99
MBRP Black Series - Exhaust Tip - 8 Inch O.D. Rolled End 4 Inch Inlet 18 Inch Length T5128BLK $219.99
MBRP Black Series - Exhaust Tip - Universal 4 Inch Hexagon Shaped 2.5 Inch Inlet 10 Inch Assembled T5173BLK $144.99
MBRP Black Series - Exhaust Tip - Universal 4 Inch Hexagon Shaped 3 Inch ID Inlet 10 Inch Assembled T5169BLK $144.99
MBRP Black Series - Exhaust Tip 3.5 Inch O.D. Angled Rolled End 3 Inch Inlet 10 Inch Length T5115BLK $94.99
MBRP Black Series - Exhaust Tip 4 Inch O.D. Angled Rolled End 2 3/4 Inch Inlet 10 Inch Length T5157BLK $109.99
MBRP Black Series - Exhaust Tip 6 Inch OD Dual Wall Angled 4 Inch Inlet 12 Inch Length T5072BLK $159.99
MBRP Black Series - Exhaust Tip 8 Inch O.D. Rolled End 5 Inch Inlet 18 Inch Length Black T5129BLK $229.99
MBRP Black Series - Exhaust Tip Dual Wall Angle Rolled End 2.5 Inch Inlet 4.5 Inch Outlet 11 Inch Length T5161BLK $129.99
MBRP Black Series - Hexagon Exhaust Tip 4 Inch Inlet 5 Inch Outlet 16 Inch Length T5165BLK $154.99
MBRP Black Series - Hexagon Exhaust Tip 4 Inch Inlet 5 Inch Outlet 16 Inch Length with Logo Back-Plate T5164BLK $164.99
MBRP Black Series - Hexagon Exhaust Tip 5 Inch Inlet 6 Inch Outlet 16 Inch Length T5167BLK $179.99
MBRP Black Series - Hexagon Exhaust Tip 5 Inch Inlet 6 Inch Outlet 16 Inch Length with Logo Back-Plate T5166BLK $199.99
MBRP Performance Series - 4 Inch - AL - Cat Back Single Side Exit Exhaust - 2001-2005 Silverado/Sierra 2500/3500 Duramax EXT/CC S6000P $494.99
MBRP Pro Series - Exhaust Tip - 4 Inch O.D. Angled Cut Rolled End 3 Inch Inlet 10 Inch Length T5155 $74.99
Mishimoto - Hot-Side Intercooler Pipe & Boot Kit - 04.5-10 GM Duramax LLY LBZ LMM MMICP-DMAX-045HBK $355.95
Mishimoto - Performance Aluminum Radiator - 01-05 GM Duramax LB7 LLY MMRAD-DMAX-01 $949.95
Mishimoto - Performance Intercooler (Silver) - 01-05 GM Duramax LB7 & LLY MMINT-DMAX-01SL $1,049.95
Mishimoto - Silicone Radiator Hose Kit - 01-05 GM 6.6L Duramax LB7 LLY MMHOSE-CHV-01DBK $319.95
Mishimoto - Thermostats (Set of 2) - High Temperature - 01-13 GM 6.6L Duramax MMTS-CHV-01DH $99.95
Mishimoto - Thermostats (Set of 2) - Low Temperature - 01-13 GM 6.6L Duramax MMTS-CHV-01DL $99.95
Mishimoto - Transmission Cooler - Direct Fit - 2003-2005 GM 6.6L LB7-LLY Duramax MMTC-DMAX-03SL $498.95
Multiuse Sensor Pigtail 8 - 1994-2010 7.3L 6.0L Ford Powerstroke - 2004.5-2016 6.6L Duramax - FPE-HAR-MU-PT-8 $14.99
New Bosch CP3 Injection Pump - 2004.5-2005 GM 6.6L LLY Duramax - 0445020030 $900.53
New Bosch Diesel Fuel Injector - 2004.5-2005 GM 6.6L LLY Duramax - 0445120027 $445.69
New Bosch Fuel Rail (Left Hand) - F00R001505 - 2004.5-2005 GM 6.6L LLY Duramax - F00R001505 $250.42
New Bosch Fuel Rail (Right Hand) - F00R001512 - 2004.5-2005 GM 6.6L LLY Duramax - F00R001512 $253.38
NSBU Pigtail - 2004.5-2005 GM 6.6L LLY Duramax with Allison Transmission - FPE-HAR-GM-NSBU-0405 $69.99
OEM (Right) Exhaust Manifold - 01-15 Duramax 6.6L 674-736 $269.08
Oil Cooler Adapter - 01-07 & 11-19 GM 6.6L Duramax - FPE-DMAX-OCADPT $99.00
Oil Level Sensor Connector with Pigtail - 2004.5-2016 6.6L Duramax - FPE-HAR-MU-PT-11 $18.99
PA4134 - Air Filter Element Panel - 2001-2005 GM 6.6L Duramax $32.64
PCV RE-ROUTE KIT - 2004.5-2010 DURAMAX LLY / LBZ / LMM 049-HSP $128.25
PF3001XL Extended Length Particulate Filter for use with FASS Fuel Systems $25.53
PPE - 3" V-Band Clamp with Flanges - 304 Stainless - 517330003 $44.99
PPE - 3.5" V-Band Clamp with Flanges - 304 Stainless - 517335003 $58.49
PPE - 4" V-Band Clamp with Flanges - 304 Stainless - 517340003 $58.49
PPE - Engine Mount Kit - Performance Silicone - 50 Hardness - OEM Firmness - 2001-2010 GM 6.6L Duramax - 168030150 $269.99
PPE - High Flow Up-Pipes - OEM Length - 2004.5-2005 GM 6.6L LLY Duramax 116120405 $449.99
PPE - High-Flow 304 Stainless Steel Down Pipe - 2004.5-2010 GM 6.6L Duramax - 117000500 $134.99
PPE - Performance Race Fuel Valve - 04.5-10 GM 6.6L Duramax & 07-12 Dodge 6.7L Cummins 1130730 $22.49
PPE - Ported Fuel Rail Fitting - 04-10 GM Duramax LLY LBZ LMM 113071000 $31.49
PPE - Up-Pipe (Driver Side) for OEM Manifold - 2001-2016 GM 6.6L Duramax - 116120005 $134.99
PPE Down-pipe support bracket for OEM length up-pipes - 2001-2016 GM 6.6L Duramax - 116110505 $31.49
Racor FF/WS Assembly PAR-FIT - Heated - 2004.5-2010 Duramax 6.6L LLY LBZ LMM PFF4245R2-02 $234.67
Radiator - 34 X 19 1/2 X 1 7/16 CORE - 2001-2005 GM 6.6L Duramax CR2510 $386.77
Rail Pressure / Map Sensor Connecter with Pigtail - 03-12 Cummins - 01-16 Duramax - FPE-HAR-RP-PT $25.99
Randy's Transmissions - Allison 1000 5-Speed Stage 1 (500HP) Transmission + Billet Torque Converter 311241030-LLY $6,235.00
Randy's Transmissions - Allison 1000 5-Speed Stage 2 (725HP) Transmission + Goerend Torque Converter (Requires billet FP insert) 311241031-LLY $7,275.00
Randy's Transmissions - Allison 1000 5-Speed Stage 3 (900HP) Transmission + Goerend Torque Converter (Requires 1-Piece billet flexplate) 311241033-LLY $8,315.00

The LLY Duramax brought the variable vane turbo to the Duramax lineup, but these trucks also earned a reputation for fuel pressure regulator issues, injector harness problems, and running hot under load. A lot of LLY owners focus on fuel supply and airflow early because those are the areas that make the truck drive better.

Fuel system components, turbochargers, and exhaust systems are common upgrades on 2004-2005 LLY trucks because airflow and fuel pressure problems affect how these trucks tow and manage heat. If the truck spends time pulling heavy loads, the mouthpiece, cooling system, and fuel-pressure side deserve attention early.

2004 - 2005 6.6L Duramax LLY

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