No but I'll try that too

That's your problem. Undo the overpipe to front pipe connection (use PB Blaster or wd-40 and let it sit for at least a few minutes before trying) after that get everything lined up with bolts hand tight, then start tightening at the header to engine bolts. Then tighten the overpipe to frontpipe. Then torque everything in that same order. If it still doesn't line up, you have a fitment issue.

Never seen fitment issues on a Tomei... The flange isn't bent or anything is it? Also; I'd strongly reccomend disconnecting everything from the header itself, and then installing the header. No over\downpipe etc, just the header alone going on, and then connect everything else.

When you say other side is on makes me think you pushed in one side completely, you do know you should try and push in both sides at the same time, making the studs come through evenly?

I feel like you are doing something incorrectly here. I bought my UEL tomei from myjdmparts on Amazon two weeks ago, and had infamous performance install it last week. They had no fitment issues, and the car runs and sounds great.

Or you can go to a muffler shop for installation.

people who are saying I had no issues when I bought my Tomei aren't winning

people who are suggesting the dude takes 10 minutes to undo all exhaust components before attempting the header are winning

I did both. What now?

you sir broke my equation :(

Did you loosen the joint and try to spread it apart or push it together to make it fit?

I took a hammer and tap it a couple times till it went in. End of story haha

P.s I tried everything and every suggestion

Ok, well that is the correct method, so congratulations.


Make sure you re-torque in a few days.

Use a blowtorch, they solve every problem :)