How to hot rod a 4BT-3.9 cummins

[evldsl]

Does anyone know how to, or who can, or where I can get the parts to increse the stock 105 hp of the 4BT-3. 9 cummins engine ?

 

[GRotman]

All the 5. 9 stuff will work for the 3. 9, depends on how much power you are looking for. Also depends on if you have a rotory or inline pump.

Injectors are the same as a 5. 9 so no problem getting increased flow from them, buy a set of 5. 9 head studs and you will have a few left over.

depending on how much power you are looking for, you can put an hx 35 off a 5. 9 on it or maybe a hx 35 and an s3 as a twin.

The sky is the limit or maybe your wallet is!