Product Summary

  • 1/4-inch 6061-T6511 aluminum block off plate for use with SBC thermostat pattern components
  • Used in many racing applications with 2-port or 4-port risers that run additional cooling hoses
  • Popular solution when used with Edelbrock Victor Series two-piece LS and Small Block Chevy water pumps
  • Not compatible with traditional upper radiator hose mounting options
  • Includes center drilled 1/4-NPT port for cooling system bleeder, additional cooling hose, or temperature sender
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Key Specs

MFG. Part #91039378
BrandSpeedway Motors
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Speedway Motors 91039378 Details

  • 1/4-inch thick 6061-T6511 aluminum block off plate for use with two or four port risers
  • Can be used directly on Edelbrock Victor Series two-piece LS water pump
  • SBC thermostat housing pattern provides multiple use capabilities
  • 1/4-NPT center hole can be used for bleeder, coolant line, or temperature sender
  • O-ring seal provides a simple, leak free installation with no gaskets required

For Race Applications Where a Standard Upper Radiator Hose Is Not Utilized

The LS engine has been swapped into just about anything you can imagine and now it is being used for dedicated sprint car racing series, sportsman class drag racing, and other racing applications where the stock LS reverse flow water pump and thermostat housing is swapped out for the popular Edelbrock Victor Series two-piece LS water pump. This water pump uses a special housing to accept a bolt-in water pump cartridge and converts your LS to a standard rotation cooling system. The housing features a standard small block Chevy thermostat housing mounting provision that you can use to install one of our 2-port or 4-port risers to for plumbing your sprint car’s cooling system needs.

Our aluminum block off plate is made from the same materials and anodized to match our risers for a clean appearance to your race car’s LS engine. The O-ring seal provides a leak free installation, while the 1/4-NPT threaded hole in the center can used to install a cooling system bleeder, additional cooling line, or a temperature gauge sender.

Speedway Motors 91039378 Specifications

KEY SPECS
MFG. Part #91039378
BrandSpeedway Motors
GENERAL
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