I have a 2003 Dodge Ram Diesel p\u. I have van aaken comp, full 3.5 inch exhaust from turbo back no cats or muffler, what else would add good horse power with out changing the turbo????

 

a cold air intake would be good u could also get some new injectors

 

Welocme to the forum busaboy!

Do us a favor and fill in some info about your truck in your signature. That'll let everybody know the goods on your truck.

Before you go too much farther with the power mods, you may want to look at getting a new torque converter (if it's auto) or a new clutch (for the manual).

The mod's you have already are gonna be getting near those stock pieces limits.

Like I was saying, go to your profile, fill out as much as you can about your truck in the sig so we know what you got.

 

for the 2003, a boost fooler elbow would be good to get more boost up high. . .if you dont have a boost and egt sensor, you need one. also, ditching the filter canister mounted lift pump and going with a fass or walbro pump will help out as well.

what you need now are supporting mods to keep what you have together, just as Rich said, torque converter, and valve body will help the trans out. but if your wanting more power and use the Van Aaken box as well, you could get a smarty programmer, or stack the VA with the quadzillabox