04.5-05 GM 6.6L LLY DURAMAX

Optimize airflow and fuel delivery for your 2004.5–2005 LLY Duramax with upgraded intercooler piping, turbo kits, and performance injectors. This section focuses on improving turbo spool and reducing EGTs while maintaining compatibility with stock turbochargers and factory engine management. Includes LLY-specific head studs and fuel system parts for daily driving or towing builds.

• 

  Magnaflow Stainless Steel Muffler 18x5x8 3x3 C/C 12249

  Magnaflow Stainless Steel Muffler 18x5x8 3x3 C/C 12249Ships to Continental US Only.   MagnaFlow Muffler Mag SS 18X5X8 3X3 C/C

  MSRP:

  Was:

  Now: $219.88

  Add to Cart The item has been added

• 

  Magnaflow Stainless Steel Muffler 14x4x9 2.5/2.5 O/O 11236

  Magnaflow Stainless Steel Muffler 14x4x9 2.5/2.5 O/O 11236Ships to Continental US Only.   MagnaFlow Muffler Mag SS 14X4X9 2.5/2.5 O/O

  MSRP:

  Was:

  Now: $175.86

  Add to Cart The item has been added

• 

  Magnaflow Stainless Steel Muffler 14x4x9 2.5/2.5 C/C 11216

  Magnaflow Stainless Steel Muffler 14x4x9 2.5/2.5 C/C 11216Ships to Continental US Only.   MagnaFlow Muffler Mag SS 14X4X9 2.5/2.5 C/C

  MSRP:

  Was:

  Now: $175.86

  Add to Cart The item has been added

• 

  Magnaflow Stainless Steel Muffler 22x5x11 3 C/C 12579

  Magnaflow Stainless Steel Muffler 22x5x11 3 C/C 12579Ships to Continental US Only.   MagnaFlow Muffler Mag SS 22X5X11 3 C/C

  MSRP:

  Was:

  Now: $321.48

  Add to Cart The item has been added

• 

  Magnaflow Stainless Steel Muffler 14x5x8 3x3 C/C 12219

  Magnaflow Stainless Steel Muffler 14x5x8 3x3 C/C 12219Ships to Continental US Only.   MagnaFlow Muffler Mag SS 14X5X8 3X3 C/C

  MSRP:

  Was:

  Now: $197.98

  Add to Cart The item has been added

• 

  Magnaflow Stainless Steel Muffler 4x4x14 3 14419

  Magnaflow Stainless Steel Muffler 4x4x14 3 14419Ships to Continental US Only.   MagnaFlow Muffler Mag SS 4X4X14 3

  MSRP:

  Was:

  Now: $184.04

  Add to Cart The item has been added

• 

  Magnaflow Stainless Steel Muffler 4x9 14 2.5/2.5 13216

  Magnaflow Stainless Steel Muffler 4x9 14 2.5/2.5 13216Ships to Continental US Only.   MagnaFlow Muffler Trb SS 4X9 14 2.5/2.5

  MSRP:

  Was:

  Now: $203.28

  Add to Cart The item has been added

• 

  Magnaflow Universal Converter 2.5in Inlet/outlet Center/center Round 53956

  Magnaflow Universal Converter 2.5in Inlet/outlet Center/center Round 53956Ships to Continental US Only.   MagnaFlow Conv Univ 2.5in Inlet/Outlet Center/Center Round

  MSRP:

  Was:

  Now: $108.00

  Add to Cart The item has been added

• 

  Magnaflow Universal Converter 2.5 53006

  Magnaflow Universal Converter 2.5 53006Ships to Continental US Only.   MagnaFlow Conv Univ 2.5

  MSRP:

  Was:

  Now: $114.00

  Add to Cart The item has been added

• 

  Magnaflow Universal Converter 2.25 Fed 53005

  Magnaflow Universal Converter 2.25 Fed 53005Ships to Continental US Only.   MagnaFlow Conv Univ 2.25 FED

  MSRP:

  Was:

  Now: $114.00

  Add to Cart The item has been added

• 

  Magnaflow Universal Converter Tip 1-pk Dw 3.50 X 4.50 2.25 Id 35125

  Magnaflow Universal Converter Tip 1-pk Dw 3.50 X 4.50 2.25 Id 35125Ships to Continental US Only.   MagnaFlow Tip 1-Pk DW 3.50 X 4.50 2.25 Id

  MSRP:

  Was:

  Now: $109.66

  Add to Cart The item has been added

• 

  Magnaflow Stainless Steel Muffler 14x4x9-3 C/C 11219

  Magnaflow Stainless Steel Muffler 14x4x9-3 C/C 11219Please Call For Availability. Ships to Continental US Only.   MagnaFlow Muffler Mag SS 14X4X9-3 C/C

  MSRP:

  Was:

  Now: $197.98

  Add to Cart The item has been added