Product Summary

Universal Fit, 2.88" Assembled Height, .65" Base Height

  • Die-cast, polished aluminum, ring sealed water neck
  • Fits Chevy V8s '55-'86 accepts normal GM thermostats and 1 1/2" I.D hoses
  • Bolt hole dimension is approximately 3-1/4" center to center
  • Strongly recommended for any performance application
  • Modified for high RPM/high flow applications, 180° temperature range

Comes as a Kit

Key Specs

BrandSpeedway Motors

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Water Neck

Pivoting water neck is die-cast, polished aluminum. The O-ring sealed water neck rises at a 90° angle and can be rotated for best possible radiator hose access. Fits all Chevy V8's 1955-86, and accepts normal GM thermostats and 1-1/2" I.D. hoses. Includes hardware.

Bolt hole dimension is approximately 3-1/4" center to center. 



Speedway takes a quality Robertshaw 330-180 high flow 180° thermostat, then modifies it to function properly in high RPM, high flow applications. They feature a balanced sleeve design and are strongly recommended for any performance application. Fits most domestic applications.

  • 2-1/8" diameter 
  • High flow 180° thermostat
  • Balanced sleeve design
  • Recommended for any performance application
  • Fits most domestic applications

Learn more about the importance of the thermostat with cooling systems and how they work by reading our tech article, Cooling System Principles.


BrandSpeedway Motors
Speedway Motors Catalog Part #910-0555
Assembled Height2.88"
Base Height.65"
Hose ID1.50"
Angle90 degree
Tube Length2.25"
Tube I.D.1.33"
Centerline of Holes3.20"
Material TypeAluminum
Gasket(s) IncludedYes
Hardware IncludedYes
Sold in QuantityKit
NotesIncludes o-ring .157 X 1.969 204-150 (910158211)