2003-2004 Chevrolet / GMC Deluxe Max Air Flow Bundle - HSP Diesel - 184-HSP

Looking for a kit that has it all? Featuring a mandrel-bent 4-inch intake tube for massive airflow gains, HSP's signature heat shield Box eliminating unwanted hot air entering the cold air intake. For every 1-degree increase in intake air temperature will result in a 3hp loss. This kit also features HSP's high flow turbo mouthpiece that outflows any ported mouthpiece on the market. It will also include HSP's hot side and cold side intercooler piping.

The factory intercooler tubing on 2001-2004 Duramax trucks is very restrictive and failure-prone. The factory intercooler tubing is only 2.25 inches in diameter and has a 90-degree boot at the intercooler that is prone to failure. With this routing there is a possibility of the hot side intercooler tube rubbing on the power steering line, causing the line to rub a hole in the tube resulting in a boost leak.

HSP's solution to this problem is to run the hot side tube directly into the intercooler using race-proven 5 layer silicone boots resulting in lower temperatures, better airflow, and added clearance in tight places. To help get the exhaust gases out of the engine, this kit includes our factory replacement 2 inches up pipes.

Our up pipes use .120 inch wall tubing with the toughest bellows on the market to ensure they last as long as your truck. When it comes to styling we have included our forward-facing thermostat housing with coolant return to help keep your IHI turbo running cool. Is your factory coolant tank starting to show its age? Also included is our factory replacement coolant tank to keep your engine bay looking good. Our coolant tank features an all-aluminum design with an incorporated low coolant sensor.

Included Components:


1x 3 inch x 4 inch Straight Boot

4x 3 inch T-bolt Clamps

2x 2.25 inch - 3 inch Reducer Boots

2x 2.25 inch T-bolt Clamps

2x M4 x .7x10mm Bolt

3x 10-32 x 3/8 inch Button Head Screw

4x 1/8 inch Aluminum Rivet

1x 3.5 inch - 4.5 inch Reducer Boot

1x 3.5 inch T- Bolt Clamp

1x 4.5 inch T-Bolt Clamp

1x 4.5 inch Filter

3x M6 x 1.0x20mm Button Head Screw

1x LB7 Turbo Inlet O-Ring

1x Radiator Cap

5x 1/2 inch Worm Gear Clamps

1x 1 inch Worm Gear Clamp

1x 1/2 inch NPT float Switch

1x Low Coolant Sensor

1x Thermostat Housing O-Ring

3x M6 x 1.0x35mm Flange Bolt

6x M6 Fender Washers

3x M6 Nylon Lock Nut

4x M8x1.25-25mm Socket Cap Bolt

4x M6 x 1.0-18mm Socket Cap Bolt

1x M14 x 1.5 to 3/8 inch Hose Barb

1x M14 x 1.5 Metric Port Plug

1x Metric bond Seal 14mm

1x 1.75 inch x 3 inch Straight Boot

1x 1.75 inch 90 degree Boot

4x 1 3/4 inch Worm Gear Clamps

2x Up-pipe Gaskets (Turbo side)

2x Up-Pipe Gaskets (Manifold Side)

16 inch of Trim seal

1.5' of 3/8 inch Heater hose


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.