I just got an oil pressure gauge for my car, just curious where you guys tapped into to install this. Also pics would be nice, I have a 5th gen

 

Go to stealthmode, tuner-toys or fast-turbo and get a stainless line with a splitter fitting on the end. You need to run the line away from the block and mount the splitter somewhere on the firewall and then hook the stock oil fitting and gauge fitting onto that.

Tees directly off of the block are well known to crack, break and cause really bad messy problems.