Stage 1

Cummins ISX All years 400 14.95L 402hp (296kW) 2244Nm Stage 1

Takes the 400 14.95L 402hp (296kW) 2244Nm from 402hp to 474hp, and 2244Nm to 2490Nm.

+72horsepower
+246newton metres

Where the gain arrives

Scaled from the manufacturer curve for this engine.

Power before and after
012825638451201,5002,5003,5004,500 RPM 012825638451202,0003,5005,000hp RPM
  • Standard 402hp
  • Remapped 474hp
Torque before and after
067213452017268901,5002,5003,5004,500 RPM 067213452017268902,0003,5005,000Nm RPM
  • Standard 2244Nm
  • Remapped 2490Nm

Standard against Stage 1

MeasureStandardAfterGain
Power402hp474hpup 72
Torque2244Nm2490Nmup 246

What Stage 1 involves

Stage 1 is for a standard car with nothing fitted. We read the original file off the ECU, write a calibration developed for the 400 14.95L 402hp (296kW) 2244Nm, then road or rolling road test it before handing the car back. Nothing is added and nothing is removed, so it looks and services exactly as it did.

It takes most of a day. We keep your original file, so it can go back to standard at any point. Figures here are for a healthy 400 14.95L 402hp (296kW) 2244Nm, and we check the car over before writing to it.

See the full 400 14.95L 402hp (296kW) 2244Nm page for every file and figure, the other engines on this ISX, or all Cummins remapping.

Book your ISX Stage 1

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.