Dose anyone know what size metric adapter I need to adapt an aftermarket electrical oil pressure gauge on a 3.4.In othere words what size threads the stock sender has.Also if I just install it and dont use a tee and keep the factory idiot light will it trigger a check engine light.thanks for any and all help on this matter.

 

what i do know is that they are british pipe threads, i tapped into the galley were the 3/8 plug is, right beside the filter, but i didnt use a BSP fitting i just got a 3/8 pipe bushing from home depot and used it, works good and no leaks