I can recommend G&H Welding, 7855 Cessna Ave. (off Airpark Road) in North Rockville/South Gaitersburg. Talk to Gordon at 301-258-2616.
They welded two O2 sensor bungs into my ceramic-coated BBK headers for $35. A little tricky in that the bungs are stainless so I needed a TIG welder with stainless rod. Overnight turnaround and good looking welds.
ggeezer
