i have a 93 d350 5 spd as a dd. its got almost 300xxx ive done a few upgrades. i was gonna see if anybody had any advice on other cheap upgrades...or some that might be pricey. i have my pump tweaked,dennyt stage 1,custom intake,2nd gen turbo,timing advanced...

exhaust?
injectors?
ect?

i want to be able to be able to put out around 400 hp

 

Probably the next step would be injectors.

 

What kind? I know a guy that can get me some 100hp ddp's cheap