Hi John,
I found the header for my 22R through the Thourley header web site. The cost
was 189.00 including the gasket.
The installation was 237.00, it's quite a job to get the old manifold bolts
out, and one of the bolts broke off in the head and had to be tapped out.
Definitely not a job for the beginner.
The power increase was worth the time and money spent.
Hope this helps! ?????????????????????????????????Pat