Case STX All 425 14.9 431hp

Real standard and upgraded performance figures for the 425 14.9 431hp engine in the Case STX All.

The Case STX All 425 14.9 431hp is one of the engines we work on regularly — here's what a stage remap typically changes for it.

Horsepower (HP)Torque (Nm)
Standard4312162
Stage 14992598
Stage 25332816
Make
Case
Model
STX
Generation
All
Engine
425 14.9 431hp
Fuel type
diesel

Frequently asked questions

Is Stage 1 tuning safe for the Case STX All 425 14.9 431hp?

Yes — Stage 1 for this engine is a software-only remap calibrated to stay within its stock mechanical limits (turbo, clutch, fueling), so no hardware changes are required.

How much more power does the 425 14.9 431hp make after tuning?

Standard output is 431 HP / 2162 Nm; Stage 1 on this engine typically reaches 499 HP / 2598 Nm. Exact results can vary slightly with fuel quality and vehicle condition.

How long does a Case STX All 425 14.9 431hp remap take?

Once your original file is uploaded through the member panel, most requests for this engine are completed within a few hours.

Can the 425 14.9 431hp be reverted to its original file?

Yes — we keep the original file on record for the request, so the ECU can be put back to stock at any time.