I believe you don't need an additional fitting if you're using the ams sending unit since it plugs straight into where the hex bolt is and you connect the oil pressure sensor on the female end of the sending unit.

 

The oil filter housing adapter is 3/8 BSPT ( British Standard Pipe Thread) so you would need the adapter to put into the housing. I won't tell you to but people simply slam the the sensor into the housing with a bunch of pipe dope and call it a day , however I don't suggest it especially per performance and longevity of the senor do it the right way. Your sensor should be 1/8 NPT ( National Pipe Thread), which will then thread into the other end of your remote line and simply mount it to the firewall. Anyone correct me if I'm wrong but I'm almost certain this is all correct

 

as long as that fitting AMS supplies is 3/8 BSPT your good to go otherwise using a Def Gaue you would need this adapter for it to work correctly - Lancer EVO 1/8 BSPT Oil Temp/Pressure Adapter

 

My AMS sending unit would go into the oil filter housing where the hex nut/bolt is. My problem is that the AMS's sending unit has a 1/8 NPT female end and my defi sensor has an 1/8 BSPT Male thread on it. So Im thinking I would need a new adapter which my layout would end up like this. Oil filter housing>AMS Sending Unit>Adapter(still trying to figure this one out)>Defi Sensor. Right?

Updated ***After more research I need to get an adapter for the AMS sending unit to the hex screw area since the AMS sending unit comes with a 3/8th NPT instead of a 3/8th BSPT. So I'll probably have to get two additional adapters on top of the AMS sending unit. Cool*** So now I need to do the following to get everything to fit right. Oil filter housing>3/8th BSPT to 1/8th NPT adapter>AMS Sending Unit>Adapter(still trying to figure this one out)>Defi Sensor. I think..

 

Ok after research the AMS sending unit line is 3/8th NPT. You will need a 3/8th BSPT to 1/8th npt adapter to put onto the AMS sending unit. So you would unscrew the male piece from the ams sending unit and swap it with the 3/8th bspt to 1/8 npt adapter... I feel its dumb for them to sell this as an application that fits "All 4G63/4B11 equipped Mitsubishi’s"(there website says that) even though it necessarily doesn't.

Figured out the thread sizing for the AMS sending unit line from this URL. 5th posting from the bottom explains it.
http://www.evoxforums.com/forums/arc...p/t-44919.html
Person from that post says the following...

"i called ams and they said the 4b11 block has a 3/8th bspt port. but the remote oil pressure sending line has a 3/8th npt. pretty much idk if i should stick the routing line in or not beacuse im worried that itll leak since npt is different from the bspt. he told me itll be fine if i use a little bit of teflon tape and itll seal up from any leaks. i dont want a leak and have it cause problems. should i just put the telfon on and stick it in there or what?
If AMS says that it will work okay, my bet is that it will work okay. Teflon tape is teh ****z."

 

like I said the only difference is there angle of the threads. If you use the tape for the Teflon paste correctly it will not leak but that choice is yours

 

Yea I get that. So pretty much you can either do the Teflon tape thing on the ends, it shouldn't leak but still possible. Or you can get the correct adapters so you know you won't have any leaks and fitment will be spot on. I think I'll do it the kinda lazy way... I will be using thread sealant instead of teflon on this though.

 

yup it's your choice , I personally used pipe dope as I call it , not the tape , never had an issue .

 

I'm fine using the adapters from 42design just not sure which one to get. 16$ is crazy expensive.

 

yea it is a bit pricey but peace of mind and having the correct threading for the housing imo is kinda worth it. You cannot find the exact piece in a hardware store unfortunately

 

I just installed a oil pressure gauge yesterday and holy took longer and more painful than I thought it wold be. Taking the hex nut off was a pain. I couldn't get heat on the area because of the propane torch I was using either had a large flame which would burn other rubber things around the area or to small which would go out constantly... Couldn't fit breaker bar and was very close to stripe the hex nut when I finally broke it free(whew).

I used the AMS sending unit, plugged it straight left of the oil filter hex nut. It doesn't go on all the way since it's NPT and the housing is BPST. I used thread sealant and put it on as much as I could(not crazy tight though, didn't want to crack the housing). Better after all and done I don't see any oil leaks. OP, you don't have to use the adapter but if you want to be 100% sure it's a perfect fit you would need to find an adapter that goes from the oil filter housing onto the sending unit. I wouldnt plug the oil pressure sensor straight onto the adapter from the oil filter housing since it could damage the oil pressure sensor from vibrations. The sensor for my defi oil pressure is like a 150 bucks, I ain't got time to buy a new one!

 

Exactly what was said above. You don't need the extra adapter but its all up to the user. As long as you have no leaks your good, sometimes after application its good to let the Teflon sit for a while depending on what kind you use. But without a doubt remote mounting it is the best way to go especially seeing how much the new sensors cost.