its very easy..
all you need is.
PB Blaster (1 can) it works faster and way better than crappy Wd-40 for loosening up the header bolts
2 extensions (10inch extensions)
Use (1) Extension on the driver side to tighten it and unloosening it.
*Note* the more extensions you use the weaker the strength is to the bolt.
You need a swivel.. get (2) because you might break 1 if there cheap
You need a deep dish socket.. 18mm for my bolts, but everyone said it was 15mm so test it before you go buy the deep dish. Get 2 of these deep dishes just incase you break it trying to loosening up the header bolts.
A light source so you can see.
A gasket for the passenger side
thats it really.
i had many midpipes on my car and swapped them in all myself becept when removing my stock H. Its very easy and i can do it in little time now. The 1st time it took me hours, but i laugh at it now because how easy it is. The hardest part is just using muscle to break the header bolts... the rest is easy as
pie.
just make sure you get a floor jack and jack the xpipe up abit than start tightening everything far as you can. Doing that will make it sit up higher. Or else you might scrap on bumps. So jack up the pipe when your tightening it up. Make sure you FINGER TIGHT EVERything when your just putting it together under your car. start at the header than go back and you should be good!