Still looking for a C421 B or C.
I have already seen some but not what I am looking for (state . . . .)
Does any of you have worked with a GE with speed Brakes installed ?
Should we also go for it ?
Thanks

I have flown a C421 A and B as well as a C421C with speed brakes. I would say it should be almost a mandatory mod if you are working in high traffic density airspace or in/around mountainous terrain. It is impossible to slow down and go down without shock cooling the engines unless you have the speed brakes (especially with the lower gear and flap speeds of the 421 a and B models)