4.8 to 5.3 stuff..

[kerrige]

You will gain a little bit maybe 20-30hp, but if you only want a ill bump get some boltons and a tune.

[mopower440]

But with just the swap to 5.3, would that get me up those hills on the interstate without it having to downshift being the bigger engine having more torque?

[kerrige]

It might, but the time and money invested will be far more than simple upgrades.

[mopower440]

yes but i dont think any upgrades would give this small motor much more lower end torque besides a turbo. Not trying to build a race truck or anything, just want to be able to do 75 up the interstate with my motorcycle in the bed without it struggling on the hills so bad..

[kerrige]

A tune will net you 15-20ish gains across the rpm range. A P&Ped throttlebody will get you gains down low and same for a CAI. Maybe $500 to get all that and see easy 35 gains.

[George C]

playing around with shift points in the tune can be a benefit to you.