G80 M3 Stage 1 Tuning & Midpipe install | 117Speed

Stage 1 and 4" mid-pipe = 684 BHP and 850 Nm. No hybrid turbos, no internal work — just a remap and a single exhaust component on an otherwise stock G80 M3. This is the first full dyno verification of the latest 117 Speed Stage 1 calibration, refined over recent map development sessions at the Nürburgring. To validate the gains, we ran four back-to-back tests on the same car, same day: → Sound check, OEM mid-pipe → Sound check, 4" resonated mid-pipe fitted → Dyno pull, Stage 1 only → Dyno pull, Stage 1 + 4" resonated mid-pipe Both the numbers and the acoustics make the case on their own. — THE CAR — BMW M3 G80 S58 3.0L twin-turbo straight-six 117 Speed Stage 1 calibration 4" resonated mid-pipe Otherwise OEM throughout. — THE NUMBERS — Peak power: 684 BHP Peak torque: 850 Nm Dyno-tested in-house at 117 Speed Manchester on 99 RON.