Earls Billet Oil Thermostat #504ERL

  • Sale
  • $105.26
  • Regular price $129.95
Shipping calculated at checkout.

Billet Aluminum Sandwich Style Oil Thermostat with 13/16-16 Center Post, and 10 AN Female O-Ring Seals on the inlets and outlets.
These billet aluminum units facilitate quick oil warm up. Opening starts at 160┬░F (71.1C) and they are fully open at 180┬░F (82.2C). Comes with optional spacer for accommodate multiple engine block castings.

Installation Notes: Fits most Chevrolet V8's with spin-on oil filter. 1968-2000 Small Block Chevy and 1968-1990 Big Block Chevy. NOTE: some 1990 and later may have metric threads. Will not accommodate metric center posts. Mount between the oil filter mounting boss and the oil filter itself.


  • Made For Most Typical Applications
  • Billet Aluminum Sandwich Style
  • Facilitate Quick Oil Warm-Up
Brand Earls
Center Stud Diameter 13/16-16
Emission Code 5
Finish Natural
Fully open 180 Degrees Farenheit
Inner O-Ring Diameter 2.887 Inches
Material Billet Aluminum
O-Ring Cross Section .139 Inches
Outer O-Ring Diameter 3.387 Inches
Port Size 7/8-14 Female (-10 O-Ring Boss)
Product Type Oil Cooler
Spacer O-Ring Cross Sect. .210 Inches
Spacer O-Ring Diameter 3.770 Inches
Starts to open 160 Degrees Farenheit

Click here for Instructions for Part# 504ERL