Oil Feed/Pressure/Temp Sources;

T fittings are just asking for trouble. As you pile on all the fittings and torque everything, you're putting all kinds of stress on the little 1/8 BSPT threads. Its hard to trust them. You wont find a little T fitting on a production car nor on a proper race car. Imagine how long that setup would endure a rally car! Sure, you dont rally your Z/G, but its always in your best interest to do everything as durable and professional as possible.

So, your next option is an oil filter spacer. Its a big step up from the T's. Its not as crowded as the T "solution", but still takes up more space and leaves more places for a potential leak. There is still a better way.

Those of you who are picky about having every little thing done right and closer to how the factory would have done it... You will probably prefer this method.

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The top one shown is the easy one... you simply remove the plug, and drill and tap it through the center to turn it into an adapter fitting. So you are pretty much plug and play after that. However, this port is only unused, and therefore available, on non-revup DE's. The other two are not so simple.

If you have the chance to remove your upper oil pan (so you can clean the insides afterwards), you can drill and tap these locations for proper oil feeds for your turbos, etc. Notice the stock oil pressure sensor was swapped to replace the plug on the front. Its stock location was used for one turbo, and just behind it another turbo oil feed was drilled and tapped. Where the oil pressure sensor is displayed in this photo, there is normally a press fit plug from the factory. Removing it requires drilling it out. Doing so with hand tools is possible (thats how it was done on the oil pan shown) but time consuming. It wouldnt be a bad idea to pay a machine shop $20 to remove it for you (we have an in-house machine shop as an option for this).

Be wise in how you place everything. In the picture shown, this exact layout probably isnt the best for a Greddy TT car, because the OEM oil pressure sensor sticking out forward will get pretty close to the drivers side turbo charge pipe. You want to protect your delicate oil lines as if they were your privates, because if they are standing out in the open they are more likely to get nailed, and a little 1/8 pipe thread isnt going to hold much of a hit.

For every port you create, its one less T fitting and one less potential problem. So even if you still end up with a T in the end, at least you dont have 2 or 3 of them anymore.

This is a time consuming weekend job that you could pull off if you're technically inclined. You shouldn't expect that even a reputable shop would do this on your vehicle when installing your FI systems (unless you specifically got a quote for it), simply because it would add several hundreds of dollars to your install bill. There are certain details that only a DIY'er car gets attention for, because to pay someone to take the time to do it for you would be too expensive to justify it! So while I call this a "free mod", its only free if you do it yourself.