5.9 24 valve Cummins performance gurus..questions

[brushtrooper]

I have a 99' Class A Holiday Rambler with the 24 valve 5.9 Cummins and Allison Auto. I am not sure which model Allison but I would guess it is a 3000 series. I believe it is a 275hp in stock form. Now to the point. I want more pulling power, so what should I be looking for? The exhaust manifold has 2 cracks and will be the first upgrade

[Big Lee]

Good luck!

[CttH]

Aftermarket fuel system is all but mandatory for the 24v VP44. After that, I'd stick with something simple like an Edge EZ and good set of gauges.

You've already got a big boost over SO and HO setups in pickups with your 275RV factory injectors.

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