BMW G82 M4 Comp Dyno Results – Unlocking the S58 Engine
The BMW G82 M4 Competition is already one of the most capable performance cars on the market, but like many modern M cars, the factory tune leaves a lot on the table. With the right combination of exhaust, intake, and ECU calibration, the S58 engine transforms into something truly ferocious.
Tested Upgrades
We put our G82 M4 Competition on the dyno with the following performance parts:
- Fi EXHAUST system (catback Dual Front-Mid Pipe Version)
- Eventuri carbon fiber intake
- Autotecknic carbon fiber intake duct
- HJS 200-cell downpipes
- BM3 ECU calibration with 4 selectable maps
Four Maps, Four Personalities
With BM3 multi-map switching, the G82 M4 Competition doesn’t just get a single tune — it offers four distinct driving experiences at the flick of a switch:
- MAP 1 – Baseline (Stock): 490 WHP / 72 wkgm Smooth and stock-like. Ideal for conservative power delivery.
- MAP 2 – Daily Mode: 530 WHP / 76 wkgm Noticeably stronger than stock, but still easy to live with day to day.
- MAP 3 – Sport Mode: 574 WHP / 78 wkgm Throttle sharpens up and the car pulls hard through the midrange (3,000–5,500 rpm). Perfect for spirited driving.
- MAP 4 – Battle Mode: 604 WHP / 82 wkgm Maximum performance. Relentless acceleration to redline with nearly 600 lb-ft at the wheels. This is where the M4 feels like it’s hunting supercars.
Dyno-Proven Gains
From MAP 1 to MAP 4, the G82 M4 Competition picked up an incredible +114 WHP and +72 lb-ft of torque at the wheels. The torque curve remains broad and flat, which means instant response no matter what gear you’re in. Horsepower continues climbing to redline, delivering that addictive top-end rush.
This combination of exhaust, intake, downpipes, and BM3 tuning turns the G82 M4 from quick to truly ferocious — a car that can comfortably handle daily driving while unleashing supercar-level performance when you want it.
