GReddy Oil Filter Block adapters provide an easy way to install oil pressure and oil temperature gauge sensors. Now, one unit includes 3 different threads and 2 different o-ring diameters to fit most Japanese engines. Made from billet aluminum and simple to install, this adapter mounts between the oil filter and engine block. Generic part for installation on most any Japanese oil fitting. Included Fittings M20xP1.5 & 3/4"x16UNF fittings 66 & 70mm O-rings