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DHD 700-155B Black Super High Flow 1/2" Duramax Fuel Block Upgrade Kit LLY LBZ LMM 

700-155B - 5B
DHD Super High Flow 1/2" Fuel Block Upgrade Kit
Pricing: $119.99



DHD 700-155B Black Super High Flow 1/2" Fuel Block Upgrade Kit LLY LBZ LMM Duramax Diesel

The DHD 700-155B Super High Flow Fuel Block Upgrade kit eliminates the restrictive factory fuel test-port/fuel block and replaces it with our high flow black anodized aluminum block. This kit is identical to our standard kit except the CP3 fuel supply hose is 1/2" diameter. This kit utilizes USA made Continental hose and also comes with our DHD stainless steel high flow CP3 fitting. Recommended on all high flow intake manifold upgrades or when running a modified stroker CP3 pump.


Eliminates fuel restrictions on the supply side of the fuel system

Minimizes drops in rail pressure on trucks with increased fuel demand

Increases horsepower

Removes the fuel test port with often interferes with intake plumbing



2004.5 - 2010 GM 6.6L Duramax Diesel

Designed to work with trucks equipped with the factory filter head and fuel returns.

Install Sheet: 700-155 Super High Flow Kit




Shipping Information

  • Item Requires Shipping
  • 3.0 lbs.
  • W10.0000” x H3.0000” x L8.0000”

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