The two of them work together coz when it at 11psi the light comes on, but when I rev her it goes up to 30 and the light goes off, the normal switch worked fine on the old engine and the gauge never went below 32psi I think, would the oil pump not be good enuf for the oil cooler kit.. The pipes are very big too.. I have the gauge on the remote oil filter and the light on the dash goes onto the the T that comes out of the block to the turbo.. Haven't a clue what's going on.