Caterpillar C4 All TH337 Acert 128hp
Real standard and upgraded performance figures for the TH337 Acert 128hp engine in the Caterpillar C4 All.
These are real standard and Stage 1 (and where available, Stage 2) figures for the Caterpillar C4 All TH337 Acert 128hp — not a generic estimate for the model range.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 128 | 499 |
| Stage 1 | 155 | 615 |
| Stage 2 | 168 | 673 |
- Make
- Caterpillar
- Model
- C4
- Generation
- All
- Engine
- TH337 Acert 128hp
- Fuel type
- diesel
Frequently asked questions
Is Stage 1 tuning safe for the Caterpillar C4 All TH337 Acert 128hp?
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 TH337 Acert 128hp make after tuning?
Standard output is 128 HP / 499 Nm; Stage 1 on this engine typically reaches 155 HP / 615 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Caterpillar C4 All TH337 Acert 128hp 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 TH337 Acert 128hp 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.