Availability: 1 In Stock
Estimated Shipping Date: Monday
Part No. DER-25720
Brand: Derale

High quality die-cast aluminium thermostatic sandwich adaptor with ½” NPT ports and an O-ring diameter of 3-1/2”, this adaptor provides external oil lines to allow the addition of an engine oil cooler to most 1963-2007 GM V8 engines. It installs between the stock engine oil filter landing and the oil filter. Stock filter is retained.


  • Sandwich adaptor type: C
  • Adaptor thread size: 13/16”-16
  • Adaptor O-ring size: 3-1/2”
  • Adaptor thickness: 2-1/4”
  • Adaptor inlet size: 1/2” NPT


  • Provides external oil lines for oil coolers without relocating the factory oil filter
  • Cast from high quality aluminium
  • Maintain factory equivalent oil filter
  • GM Type C Sandwich Adaptor with 13/16”-16 thread size, fits most applications
  • GM applications with 3-1/2” O-ring/filter diameter