ok make sure you got the right header for the car and the right gasket too and this should talk to long to do mine took me only 4 hours to take the old on off and the new header on. so take you time and get the right parts

 

start in the center and work your way to the sides when you tighten the studs

 

My car is a 2001 GS-R, 2-door.

My header is a Comptech TIG welded header. (Part Number 210-001). I know I have the right header for my car.

The gasket that I am currently using is the original gasket from my car. I tried to use the autozone gasket, but quality was a disappointment.

I put the old gasket back on exactly like when it had originally came off.

When I had tightened the bolts, I started from the inside out.

Thanks for everyones help.

I am going to work on it tomorrow, when there is more light and I have more patience.