2003 – 2004 Chevrolet / GMC Cold Side Tube Factory Style Gloss Black HSP Diesel – 105-HSP-GB


Product Highlights:

The LB7 Duramax has a very restricted charge air system from the factory. After realizing the potential power loss from the small-diameter factory tubes, we increased the size of the tubing to 3 Inch which proved major power gains over the factory intercooler system. While dyno testing the HSP upgraded intercooler tubing, we saw incredible horsepower and torque gains from such an overlooked component. Power increases will fluctuate between models due to tuning calibrations, turbo options, and aftermarket fuel systems. One thing to be sure of though, you will only be able to move as much air as your intercooler system will flow. So, be sure to use the HSP upgraded charge tubes to maximize the potential of your truck.

These components have been designed and are intended for closed-course competition only! It becomes the sole responsibility of the customer to ensure that the use of their vehicle and items purchased comply with federal, state, and local regulations. Performance products are legal only for sanctioned closed course racing vehicles, which may never be used on a public highway. The customer assumes all risks and expenses relating to unlawful vehicle operation on public roads.

*By purchasing this product, you have agreed not to hold HSP Diesel.com liable for unlawful vehicle operation

Included Components:

  • 1x 2.25 Inch – 3 Inch Reducer Boot
  • 1x 3 Inch T-Bolt Clamp
  • 1x 2.25 Inch T-Bolt Clamp



  • Increased Performance and Spool Up
  • Powder coating option to dress up the engine bay
  • Upgraded High strength silicone boots
  • Many powder coat color options


Compatible with:

LB7: 03-04 VIN Code 1

How Do People Know Vin Code? Engine code is dictated by the 8th character of the VIN number. The 10th character is the year of the truck.



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