HSP Diesel Max Flow Bridge and Cold Side Tube Behind Alt - LBZ, LMM Duramax

Thoroughbred Sku #: HSP004-HSP-X

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$625.00 - $690.00


Product Details

Product Name: HSP Diesel Max Flow Bridge and Cold Side Tube Behind Alt - LBZ, LMM Duramax
Manufacturer: HSP Diesel
Manufacturer Part #: 004-HSP-X
Thoroughbred Diesel Part #: HSP004-HSP-X
Fitment Notes: LBZ, LMM Duramax

Increase performance and flow with our upgraded 3" Max Flow Bridge and Cold Side Kit. Our precision cast and CNC machined bridge section allows for maximum efficiency, as well as, a perfect fit every time. Our two-piece design allows for a much easier installation than the other kits on the market. Two M8 studs, 12-point nuts, and a high-strength O-ring locate and hold the 3" bridge together to eliminate the possibility of boost leaks. Our bridges have been pressure tested to over 100 PSI to ensure your truck can perform to its highest potential. The mandrel bent 3'' cold side tube complements the y-bridge for the ultimate efficiency, flow, and maximum performance capabilities of your truck. This cold side tube in combination with the max flow bridge is best suited for factory or drop in replacement chargers, as it resembles the factory intercooler routing.


  • Precision CNC machined Billet bridge section
  • (2) 3"x4" Straight Boots (430-RFAB)
  • (4) 3" T-Bolt Clamps (422-RFAB)
  • (24") 5/8" Heater Hose (401-RFAB)
  • (2) 5/8" Worm Gear Clamps (403-RFAB)
  • (2) Bridge Neck Stud (902-RFAB)
  • (2) Bridge Neck 12-Point Nut (903-RFAB)
  • (1) Bridge Neck O-Ring (670-RFAB)
  • (1) 1/8" NPT Plug 


  • LBZ: 06-07 VIN Code 2 or D
  • LMM: 07.5-10 VIN Code 6


  • Increase performance and spool up
  • Port matched CNC machined billet bridge section
  • Better fitment over hand fabricated bridge section
  • Powder coat option to dress up engine bay
  • Two piece bridge design for easier install than other Y-bridge kits on the market
  • Cold-side routes in a factory location for a seamless look
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  • Does this fit a stock lbz?

    Austin Oliver | 4/30/2019

    Yes, this is a drop in replacement for trucks with stock chargers.