HSP Diesel 2006-2010 LBZ/LMM Duramax Max Flow Bridge and Cold Side Tube Behind Alt - 004-HSP

HSP Max Flow Y-Bridge & Cold Side Tube for LBZ & LMM Duramax (2006–2010)

The HSP Max Flow Y-Bridge and Cold Side Tube Kit is a performance upgrade for 2006–2010 Chevrolet and GMC Duramax LBZ and LMM trucks. This complete HSP Y-Bridge kit combines a precision-built Y-bridge with a mandrel-bent cold side intercooler tube to reduce factory restrictions and improve airflow, reliability, and overall performance.

Why You Need an HSP Y-Bridge for LBZ & LMM Duramax

The factory Duramax Y-bridge is known for restrictive airflow, inconsistent sealing, and boost leaks that limit performance. The HSP Y-Bridge for LBZ and LMM Duramax engines was designed to correct these issues by improving airflow efficiency while maintaining OEM-style fitment.

What Makes the HSP Max Flow Y-Bridge Kit Different?

The HSP Y-Bridge features a 3-inch, two-piece CNC-machined design that simplifies installation while delivering consistent airflow and reliable sealing. Each bridge is hand-fit and sealed using an O-ring and dual M8 studs, allowing it to hold over 100 PSI of boost without failure.

Paired with the bridge is a 3-inch mandrel-bent cold side intercooler tube routed behind the alternator. This design reduces turbulence, improves turbo spool-up, and enhances throttle response while maintaining a factory-style engine bay layout.

What’s Included in the HSP Y-Bridge Kit

• 1x Bridge Section (HSP-IN-220)
• 1x Cold Side Tube – Behind Alternator (HSP-IN-202)
• 1x Bridge Neck (HSP-IN-743-2)
• 1x Bridge Neck O-Ring (RFB-670-RFAB)
• 1x 1/8" NPT Brass Plug (RFB-811-RFAB)
• 2x Bridge Neck Studs (RFB-902-RFAB)
• 2x Bridge Neck 12-Point Nuts (RFB-903-RFAB)
• 24" 5/8" Heater Hose (RFB-401-RFAB)
• 2x 5/8" Worm Gear Clamps (RFB-403-RFAB)
• 4x 3" T-Bolt Clamps (RFB-422-RFAB)
• 2x 3"x4" Straight Silicone Boots (RFB-430-RFAB)

Fitment – LBZ & LMM Duramax

• LBZ: 2006–2007 (VIN Code 2 or D)
• LMM: 2007.5–2010 (VIN Code 6)

Note: Engine code is the 8th character of the VIN; model year is the 10th character.

Overview

• Increased airflow and performance
• Faster turbo spool-up
• Two-piece Y-bridge design for improved fitment
• Mandrel-bent cold side tube to reduce turbulence
• 3-inch diameter piping throughout
• Multiple color and custom coating options
• Factory-style routing compatible with drop-in turbochargers

Special Note

This Y-Bridge and cold side tube kit is best suited for factory or drop-in replacement turbochargers, as it follows OEM-style intercooler routing.

Our Warranty

HSP NO BS LIMITED LIFETIME WARRANTY

At HSP Diesel, we stand behind every product we manufacture. Our No BS Limited Lifetime Warranty reflects our commitment to quality, reliability, and customer-first support.

For more information about our Lifetime, No BS Warranty, click HERE.