2006-2010 Duramax LBZ/LMM Max Flow Bridge and Cold Side Tube Behind Alt (004-HSP)
The 004-HSP, or HSP Max Flow Bridge and Cold Side Tube with behind-alternator routing, is a game-changing upgrade for 2006-2010 Duramax trucks. By bundling our precision-built Y-bridge and high-flow cold side pipe, we've created a kit that dramatically improves airflow and performance.
Why You Need a Max Flow Bridge and Cold Side Tube
The factory bridge is notoriously restrictive, with poor airflow characteristics that create boost leaks and turbulence. HSP Diesel identified these weak points and built a superior solution that maximizes efficiency without sacrificing reliability or fitment.
What Makes the HSP Max Flow Bridge and Cold Side Tube Different?
We started by redesigning the bridge into a 3" two-piece construction that simplifies installation while offering outstanding performance. Precision CNC-machined, hand-fit, and sealed with an O-ring and dual M8 studs, this setup holds over 100 PSI with ease.
The 3" mandrel-bent cold side tube complements the bridge perfectly, reducing turbulence and improving spool-up. Together, these components unlock serious airflow gains and support higher horsepower while maintaining a factory-like fit and finish.
- Increased performance and airflow
- Faster turbo spool-up
- Better fitment with a two-piece bridge design
- Mandrel-bent cold side pipe for reduced turbulence
- 3" diameter piping throughout
- Multiple color and custom coating options
- Factory-routing compatible cold side for drop-in turbochargers
- 1x Bridge Section (HSP-IN-220)
- 1x Coldside Behind Alt (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 Stud (RFB-902-RFAB)
- 2x Bridge Neck 12-Point Nut (RFB-903-RFAB)
- 24x 5/8" Heater Hose (RFB-401-RFAB)
- 2x 5/8" Worm Gear Clamp (RFB-403-RFAB)
- 4x 3" T-Bolt Clamp (RFB-422-RFAB)
- 2x 3"x4" Straight Boot (RFB-430-RFAB)
- LBZ: 06“07 (VIN Code 2 or D)
- LMM: 07.5“10 (VIN Code 6)
This kit is best suited for factory or drop-in replacement turbochargers, as it follows OEM-style intercooler routing.
Order Processing Time:
Orders are typically processed within 24-48 hours after the order has been placed.
Custom or special order items may take longer to process, typically 3-5 business days depending on the product and customization required.
Shipping Methods:
Standard Shipping (3-7 business days - location dependent)
Express Shipping (1-2 business days- location dependent)
Packaging:
All parts are securely packaged to better prevent any damage during transit. Fragile or high-value parts will be packaged with additional protective materials, such as bubble wrap or foam padding.
Shipping Rates:
Shipping rates vary based on the size, weight, and destination of the package. You can view the estimated shipping costs for your order during the checkout process before placing your order.
Order Tracking:
Once your order has been shipped, you will receive an email with the tracking number and carrier information. You can also track your order status by logging into your OCDiesel account.
USA Shipping:
We ship to the USA! (Except California) Please note that USA shipping rates and delivery times may vary based on destination. Customers are responsible for any customs fees, import taxes, or additional charges that may apply.
Not all products are stocked in-house. To ensure you receive your desired items promptly, please check for availability before placing your order. Some products may be backordered due to high demand or supply chain constraints, which could result in longer delivery times.
We strive to keep our inventory updated regularly, but availability can change quickly. For the most accurate information, contact the OCDiesel customer service team using either this link, or the chat bubble on the bottom right of this page.
Special order items are custom-ordered specifically for you and are not eligible for cancellation or return once the order has been placed. If an exception is granted, the item must be unused, in original manufacturer packaging, and in resalable condition.
All approved cancellations or returns of special order items are subject to restocking fees, with some items subject to higher fees depending on supplier policies. Return Authorization (RA #) is required, and all return shipments must include tracking. Return shipping costs are the responsibility of the customer.
Custom-built, made-to-order, electronic, and digital goods are strictly final sale—no exceptions.
For full details on return procedures, fees, and exceptions, click here.
