Rally Road Oil Distribution Gauge BlockDescription This is a handy and easy way to add aftermarket oil pressure sending units to your car. A Stainless steel banjo fitting attaches this machined block to oil pressure port on your oil filter housing. You can then attach your factory oil pressure sender to one of the M12x1. 5 threaded ports. The nice thing about the banjo is that it allows you to rotate clock the distribution block to the angle that best fits. The gauge block also has an