OKAY, i am about to give up, i live in SF and i tried numrous places, i.e: kragen, home depot, ace hardware etc.

i know thw bolt has to be m12 x 1.25 to plug in the bung but the thing is the slot of tapered. Where can i purchase a tapered bolt like that? I already bought a regular 12x 1.25 bolt and i only twist twice and it gets suck



For ppl who installed their own gutted UPPIPES, what you guys do

 

when u gut ur pipe, don't u already need a 2.2 ohm in place?

 

are you sure that you didn't accidentally buy a m12x 125 mm long... the bolt length doesn't really matter as long as it's 1.25 pitch (pitch determines what kind of threads are on the bolt) just make sure that you buy a nut that fits the bolt also and put them together before you put it into the uppipe. this will let you set the bolt to what ever depth you need and there won't be any of it blocking the pipe

 

I bought my bolts at a Pep Boys. They have a M12 x 1.25 bolt that is about 1.5 inches long with a tapered tip. It screws in about half an inch before bottoming out. I just torqued to 30lb-ft and have had no problems. even if the bolt doesn't have a tapered tip there shouldn't be any problems as long as it fits properly and is torqued down. If you can only get the bolt you currently have to twist twice I'm not sure it is the right size, is it bottoming out or is it just getting stuck in the threads? As long as it screws in properly and you torque it you shouldn't have any problems.

 

Actually, the EGT probe, or any properly sized bolt, will only thread in about a half an inch. Have you looked at an EGT probe or bung hole for a wrx? The threaded portion is only about 1/2 long. The probe itself sticks out another inch or so after the threaded portion ends. You can't thread a bolt any deeper than 1/2 inch because the EGT probe hole has an angled bottom, so it is impossible to actually thread a bolt so it protrudes into the inside of the pipe. When you torque a bolt into the hole it will bottom out against the angled portion of the hole. You will have a tight seal even though the bolt is still sticking partially out of the pipe. And I definitely recommend using a bolt instead of sticking the probe back in. You don't want the probe to fail and get sucked into the turbo.

 

You need to put the 2.2k resistor inline with the harness that is connected to the car not the half of the harness connected to the probe. You don't even have to solder it, just disconnect the probe at the harness and slot the wires of the resistor into the two holes on the car-side harness and wrap it up with electical tape. Remove the egt probe from the pipe (with it's wire and harness) and put an M12 x 1.25 bolt in its place. Torque it down to 30lb-ft and you'll be fine. Trust me, it will not come undone and there is no need to use a thread lock or other glue, it would burn up due to the heat anyway.