G16 Tuning
BMW's 840i Gran Coupe, M850i Gran Coupe, 2020–2026. Powered by the B58/N63TU engine family.
Stage pricing for the G16
The G16 is the 8 Series Gran Coupe — the four-door version of the G15, a long, low, elegant grand tourer with rear doors. Same engines: the 840i B58 (333 hp) and the M850i N63 V8 (523 hp), tuning as they do everywhere (G15 page; B58 on G20, N63 on G11).
It's the 8 for people who want the grand-tourer's presence with usable rear doors — arguably the most practical way to own one. Honest notes are the engine families' usual items.
So the G16 is the four-door GT: 8 Series elegance, the practicality of doors.
Parts that fit the G16
DR Forged wheels for the G16
Custom, made-to-order forged wheels — built to your car's spec, so any of them fits the G16. Pick the look; we build the fitment.
Tech essays for the G16
Tuning and Your Warranty: What's Reversible, and What's Actually Detectable
The honest version of the warranty question — what Magnuson-Moss actually says, what we flash back before a dealer visit, and what...
ReadFEMTO & the Bosch DME Lock Guide for BMW & MINI
When it comes to tuning modern BMW and MINI vehicles, enthusiasts have encountered significant challenges starting with the 2020+ models. Bosch's updated…
ReadUpcoming events
Cars & Coffee Delray Beach
Cars & Coffee Miami — Jungle Island Father's Day
Supercar Sundays Florida — Father's Day Car Show
Set the G16 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.