I did a bunch of performance mods last year before I brought the car out of winter storage. I was so excited....Now this 37000 original Kilometer garage Queen GN was gonna really scream!.....and it ,for about a week Suddenly it seemed sluggish. Seemed to be running rich. Almost seemed like it was chugging if that's a word. Well.....wouldn't you know, I had a crack on my driver's side header . Well I persevered thru the summer. I decided to weld the header this winter. After much reading ,and looking at some of the other board members cracked headers (here I thought I was the only one this had ever happened to) I decided to attack this weld job like I do most projects..."way over the top" I sandblasted the header,then glass beaded it. Then I had the crack tig welded closed. Then I had a small stainless rod welded between the two ports for reinforcement. I then made a plate out of .020 stainless steel to cover the weld, and make it pretty. Finally I had both headers,my crossover, down pipe, and gutted catalytic converter all ceramic coated. I also had three coats of "XMC" thermal coating applied to the insides of all parts. Thanks to Jim C. aka Philly Turbo Six for a great example on how to weld a header. I'd also like to thank Fireball Coatings in Erin Ont. for doing an awesome job of the ceramic coating. Dave