FEULING® Offset sandwich adapters allow easy hook up of any style remote oil cooler or additional oil filter set up. These adapters are designed with a pressure relief valve vs. the standard thermostat this allows constant oil flow through your remote oil cooler with total protection from starving the engine of oil flow. 1/8” NPT ports, fittings not included. Fits ’99-’11 Twin Cam and EFI EVO models.