HSP 2003-2004 Silverado/Sierra 2500/3500 Max Air Flow Bundle Kingsport Grey

Featuring a mandrel-bent 4.5-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 2003-2004 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. Included Components: 1x 3 Inch 4 Inch Straight Boot 4x 3 Inch T-bolt Clamps 1x 2.25 Inch - 3 Inch Reducer Boot 1x 2.25 Inch T-bolt Clamp 1x 2.25 Inch - 3 Inch Reducer Boot 1x 2.25 Inch T-bolt Clamp 2x M4x.7x10mm Bolt 3x 10-32 x 3/8 inch Button Head Screws 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 M6x1.0x20mm Button Head Screws 1x Turbo Inlet O-Ring 16 inch of Trim Seal Details: Race Proven 5 layer Silicone Boots 4.5 Inch Intake Tube Made in the USA Sold As a Kit 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.