BMW
M3 E46
2004
The E46 M3 pairs the naturally aspirated S54 straight-six with a balanced chassis, making it one of the most rewarding platforms to tune for spirited road and track use.
Build This in the AppSpecifications
The Numbers
| Spec | Detail |
|---|---|
| Engine | 3.2L S54B32 inline-six |
| Power | 338 hp @ 7900 rpm |
| Torque | 262 lb-ft @ 4900 rpm |
| Redline | 8000 rpm |
| Drivetrain | RWD, 6-speed manual |
Intake and Exhaust
A free-flowing intake and a high-flow exhaust let the S54 breathe to its 8000 rpm redline. Pair these with a supporting tune to unlock the top-end response the engine was designed for.
Air-Fuel Tuning
On the S54, target around 12.5:1 at wide open throttle for the best balance of power and reliability. Make small adjustments between dyno pulls and watch how AFR shifts affect peak output.
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