If you are looking for a "simple" add on,, definatly go for a plane jane Power Edge EZ. .
http://www.edgeproductsinc.com/ This little box doesn't NEED gauges, will give you about ~. 5-2MPG increase and about 50HP
Although,, I do suggest you get gauges,,
for a High Output Cummins, and 6-speed transmission (ETH-DEE)
I suggest
Fuel pressure Gauge
Boost Pressure Gauge, and
Exhaust Temperature Gauge
If wanna make some serious usable Power,, you can go with the PE COMP Box (gauges required). If you don't like smoke, stay away from ~biggish injectors. Diesel Dynamics Stage 1 injectors are as big as *I* recommend,, but who am I? nobody really.
That stock clutch won't hold up to a PE COMP,
AND injectors. A COMP it will hold,, and Injectors, it will hold, but probly not both. (Injectors will void warrenty) PE COMP will void warrentee IF Injection pump wire is pierced.
Feel free to make however much HP you want. . You can make 400RWHP, or just settle for an EZ, that will put 50 extra HP down.
Your HP levels depend on your wallet, or credit card size. and is not limited by the Strength of the Cummins.
BOMBs Away.
MerrickNJr