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← Cummins QSX engines

Cummins QSX 635 14.95L 637hp (468kW) 2788Nm

I · 637 hp
Stage 1
OriginalAfter tuningDiff
Power hp637 700 +63
Torque Nm2788 3340 +552
Power gain
+10%
Torque gain
+20%
Fuel economy −10%
Before
42.5 L / 100 km
After tuning
38.4 L / 100 km
Saves ≈ 4.1 L / 100 km — about 4 089 L (over 100 000 km) ≈ €7 155
Estimate for a typical duty cycle · real saving depends on load & driving style
Ready to feel these +63 hp on the road?
Get your ready-to-flash Stage 1 file for the Cummins QSX
Order tuning file →
Stage 1 file from €120
Exact price depends on the ECU — confirmed when you upload the file
✓ Original file back-up ✓ Delivered in ~30 min ✓ Support included
Power graph / Stage 1
PowerTorqueStock
dyno graph