exhaust brake? what brand is best?

[AH64ID]

The Weeper should be cool, I am doubt it will be very hard to mod to a 5. 9 as the heads are pretty much identical (at least what I have seen and read).

It will be interesting to see if the AT can handle that much retarding hp.

 

[TCDiesel]

It will, but You need More then just the common Upgrade , 1st You you will need the TV actuator 03/04, 04. 5/07 the software for TV module then Double springs and Correct VB for lockup and downshifting, with modded clutches Steel/Material combined and all the internals.