you keep the stock oil presure sensor i used an adapter with braided hose to add the extra sensor. http://www.ebay.co.uk/itm/MR2-STARLET-SUPRA-TURBO-CELICA-COROLLA-REMOTE-OIL-PRESSURE-GAUGE-ADAPTOR-MLR-JE-/122067868092?fits=Car+Make%3AToyota%7CModel%3AStarlet&hash=item1c6bcfd9bc:g:mXgAAOSw6DtYUq7~ cheers nick.