Leah,
I talked to the Pac Brake representative here a the FMCA rally, and he said that there was no exhaust brake on the drawing board or even in any stage of consideration at the Pac Brake home office for the DPF equipped C9 .
Pac Brake's viewpoint according to him is that it is too complicated to engineer around Cat's computer controlled regenerator, and the market is too small since Cat has quit the over the road market.
Gerald