Stage pricing for the F98
Cooling, downpipe, fueling — the ceiling worth chasing on factory turbos.
Build this stage Stage 2 methodologyBigger fueling, often a hybrid or Phantom turbo. Per-car.
Build this stage Stage 3 methodologyThe X4 M is the most honest page in the lineup, because it's the X3 M with a different roofline. Same forged-crank S58 (473 hp, 510 in the Competition), same running gear, same all-wheel-drive mission — BMW just swapped the X3's upright tailgate for the X4's swept fastback.
So everything on the F97 X3 M page applies here without an asterisk: a real M car in an SUV body, running the engine the whole M3/M4 line later inherited. The build is identical — the S58 takes a calibration the same way (full story on the G80 page), scaled for the vehicle's mass.
What you're choosing between is shape and space. The X4 M trades a little rear headroom and cargo for the lower, sportier profile; everything that makes it quick is shared with the X3 M. Pick the silhouette you prefer — they build the same.
Parts that fit the F98
DR Forged wheels for the F98
Custom, made-to-order forged wheels — built to your car's spec, so any of them fits the F98. Pick the look; we build the fitment.
Upcoming events
Cars & Coffee Delray Beach
Cars & Coffee Miami — Jungle Island Father's Day
Supercar Sundays Florida — Father's Day Car Show
Set the F98 as your garage vehicle and the rest of the store filters to what fits it.
Set vehicleBefore you tune.
Will my dealer flag the tune at service?
The bootmod3 flash is non-destructive and reversible. Revert to stock before a dealer appointment and the ECU is back to factory in a few minutes; re-flash after service. We document the revert step in writing so the next person opening your file knows what's there.
Is it safe for the engine?
Every tune we ship has been datalogged on the car it was written for. We look at knock counts, fuel trims, boost behavior, and intake temps before we sign off. If the numbers don't sit right, we revise. That review and the revision policy are built into what the tune costs.
How long until I have a working tune?
Most calibrations turn around in a few days. We log, review, and revise before anything ships — we would rather get it right than get it out fast.
Can I go back to stock?
Yes. bootmod3 supports a stock revert that returns the ECU to factory calibration in under five minutes. The flash is non-destructive — nothing in the BMW DME is permanently modified. Most owners revert before trade-in.