Engine

Cummins QSX All years 525 14.95L 527hp (388kW) 2450Nm remap

Standard this engine makes 527hp and 2450Nm. Our Stage 1 file takes it to 622hp and 2892Nm.

+95horsepower
+442newton metres
1stage available

Where the power arrives

Both curves scaled from the manufacturer figures, on the Stage 1 file.

Power before and after
016833650467201,5002,5003,5004,500 RPM 016833650467202,0003,5005,000hp RPM
  • Standard 527hp
  • Remapped 622hp
Torque before and after
078115622343312301,5002,5003,5004,500 RPM 078115622343312302,0003,5005,000Nm RPM
  • Standard 2450Nm
  • Remapped 2892Nm

Stages for this engine

Stage 1 needs nothing fitted. Anything above assumes the supporting hardware is on the car already.

Every figure for the 525 14.95L 527hp (388kW) 2450Nm

FilePowerGainTorqueGainPrice
Standard527hpn/a2450Nmn/an/a
Stage 1622hpup 952892Nmup 442ask us

Economy files show no new power figure because they are written for torque and drivability rather than peak output.

Remapping the 525 14.95L 527hp (388kW) 2450Nm

The Cummins QSX All years 525 14.95L 527hp (388kW) 2450Nm runs a factory calibration built to cope with poor fuel, skipped servicing and hot countries. We rewrite the fuelling, boost and timing for this engine on this car, then test it before you get it back. The original file is kept, so it can go back to standard whenever you want.

On the petrol side the difference shows in throttle response and in how hard it pulls through the top half of the rev range. It feels sharper off idle and keeps going where it used to flatten out.

Figures on this page are for a standard car in good health. We read the fault codes and check the basics first, and if something needs attention we will tell you before we write anything. Have a look at the other engines on the All years, the full QSX range, or everything we do for Cummins.

Other engines on this QSX

All years cars.

Book your QSX

We write and test every file at our Aston workshop, on our own rolling road. Ring us with your reg and we will tell you what your car should make before you commit to anything.

Call 0121 238 8663 Ask a question