Availability: In Stock
Estimated Shipping Date: Tomorrow
Part No. DER-15720
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 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. Kit includes sleeve nut and brass hose barb fittings.


  • 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: ½” NPT
  • Barb size: ½”


  • Provides external oil lines for oil coolers without relocating the factory oil filter
  • Cast from high quality aluminium
  • Retain 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
  • Complete kit includes ½” hose barb brass fittings, sandwich adaptor, sleeve nuts and O ring