2004.5-2005 Duramax LLY HSP Max Flow Bridge to Factory Cold Side (206-HSP)
The 206-HSP HSP Max Flow Bridge to Factory Cold Side is a bolt-on LLY Y-bridge upgrade for 2004.5–2005 Chevrolet and GMC Duramax trucks. This LLY Duramax Y-bridge kit is designed to increase airflow and reduce boost leaks while retaining compatibility with the OEM factory cold side tube.
Why Upgrade to an LLY Y-Bridge?
The factory bridge on the 2004.5–2005 LLY Duramax can become a restriction as airflow demand increases. An upgraded Y bridge for LLY Duramax improves flow to support better throttle response and turbo spool-up, while also addressing common sealing issues that can lead to boost leaks.
What Makes the HSP Y Bridge for LLY Duramax Different?
HSP designed this LLY Y bridge as a 3-inch precision-cast and CNC-machined two-piece bridge that connects to the stock cold side system. The two-piece construction helps simplify installation, improves sealing, and delivers a noticeable airflow improvement compared to the OEM bridge setup.
- LLY Duramax Y-bridge kit designed to work with the factory cold side tube
- Improved airflow for better performance and turbo spool-up
- Two-piece design for easier install and improved sealing
- 3-inch diameter bridge for increased flow
- Precision-cast and CNC-machined construction
- Powder coating options for a clean engine bay appearance
- 1x Bridge Neck (HSP-IN-209)
- 1x Bridge (HSP-IN-222)
- 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)
- 24" 5/8" Heater Hose (RFB-401-RFAB)
- 2x 5/8" Worm Gear Clamp (RFB-403-RFAB)
- 1x 2.25" T-Bolt Clamp (RFB-420-RFAB)
- 1x 3" T-Bolt Clamp (RFB-422-RFAB)
- 1x 2.25" to 3" Reducer Boot (RFB-441-RFAB)
LLY: 2004.5-2005 (VIN Code 2)
The engine code is identified by the 8th character of the VIN, and the model year is shown by the 10th character.
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