Tuning · G-Chassis Family

G-Chassis Tuning

The modern B-series — B48, B58, S58, S63TU. The platform we've spent the most R&D on. BM3-native calibration, in-house turbos for the cars that have outgrown their stock hardware, and full Stage 3 paths on the marquee chassis.

Chassis we support

The G-Chassis platform is the one we've spent the most R&D budget on. B58 and S58 both respond beautifully to calibration. The S58 in particular — the engine in the G80 M3, G82 M4, G87 M2 — is the cleanest sheet-of-paper BMW M engine in a decade, and its response to a proper Stage 1 / Stage 2 / Stage 3 path is repeatable, predictable, and dyno-honest.

On the volume side, B48 and B58 cars (G20 330i / M340i, G22 / G26 4-series, G29 Z4, G42 230i / M240i) carry a Stage 1 calibration that's been tested across hundreds of cars. Stage 2 and 3 paths exist for every G-platform that has the hardware to support them. The Phantom Series — our in-house turbos for the cars that have outgrown their stock units — is built around exactly these platforms.

Parts that fit the G-Chassis family

Active Autowerke Signature downpipe for BMW B58 (G20 G22 F30 F32)
Active Autowerke Signature Downpipe — B58
B58
$1,805
Active Autowerke Signature downpipes with GESI cat for BMW S58 (G80 G82 G87)
Active Autowerke Signature Downpipes w/ GESI Cat — S58
S58
$3,665
Active Autowerke Signature equal-length mid-pipe with G-Brace for BMW S58 G80 M3 G82 M4
Active Autowerke Signature Equal-Length Mid-Pipe w/ G-Brace — S58
S58
$2,065
Active Autowerke Signature single mid-pipe for BMW S58 G80 M3, G82 M4
Active Autowerke Signature Single Mid-Pipe — S58 (G80 M3 / G82 M4)
S58
$1,438.80
Active Autowerke Signature X-pipe mid-pipe for BMW S58 G80 M3 G82 M4
Active Autowerke Signature X-Pipe Mid-Pipe — S58 (G80 M3 / G82 M4)
S58
$1,725
AIRTEC chargecooler radiator for BMW B58 — F30, F32, G20, G22, G29, G42
AIRTEC Chargecooler Radiator — B58
B58
$1,375
BMW G01 X3 M40i — Custom BM3 Tune
BMW G01 X3 M40i — Custom BM3 Tune
STAGES 1–3
B58
From $495
BMW G01 X3 sDrive30i / xDrive30i — Custom BM3 Tune
BMW G01 X3 sDrive30i / xDrive30i — Custom BM3 Tune
STAGES 1–3
B48
From $495
BMW G02 X4 M40i — Custom BM3 Tune
BMW G02 X4 M40i — Custom BM3 Tune
STAGES 1–3
B58
From $495
BMW G02 X4 sDrive30i / xDrive30i — Custom BM3 Tune
BMW G02 X4 sDrive30i / xDrive30i — Custom BM3 Tune
STAGES 1–3
B48
From $495
BMW G05 X5 M50i — Custom BM3 Tune (N63TU)
BMW G05 X5 M50i — Custom BM3 Tune (N63TU)
STAGES 1–3
N63TU
From $495
BMW G05 X5 sDrive40i / xDrive40i — Custom BM3 Tune
BMW G05 X5 sDrive40i / xDrive40i — Custom BM3 Tune
STAGES 1–3
B58
From $495
BMW G06 X6 M50i — Custom BM3 Tune (N63TU)
BMW G06 X6 M50i — Custom BM3 Tune (N63TU)
STAGES 1–3
N63TU
From $495
BMW G06 X6 sDrive40i / xDrive40i — Custom BM3 Tune
BMW G06 X6 sDrive40i / xDrive40i — Custom BM3 Tune
STAGES 1–3
B58
From $495
BMW G07 X7 M50i — Custom BM3 Tune (N63TU)
BMW G07 X7 M50i — Custom BM3 Tune (N63TU)
STAGES 1–3
N63TU
From $495
BMW G07 X7 xDrive40i — Custom BM3 Tune
BMW G07 X7 xDrive40i — Custom BM3 Tune
STAGES 1–3
B58
From $495
BMW G11 740i — Custom BM3 Tune
BMW G11 740i — Custom BM3 Tune
STAGES 1–3
B58
From $495
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BMW G11 750i (N63TU2)
BMW G11 750i (N63TU2)
STAGES 1–3
N63TU2
From $495
BMW G14 840i — Custom BM3 Tune
BMW G14 840i — Custom BM3 Tune
STAGE 1
B58
$495
BMW G14 M850i — Custom BM3 Tune (N63TU)
BMW G14 M850i — Custom BM3 Tune (N63TU)
STAGES 1–3
N63TU
From $495
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BMW G15 840i Coupe — Custom BM3 Tune (B58)
BMW G15 840i Coupe — Custom BM3 Tune (B58)
STAGES 1–3
B58
From $495
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BMW G15 M850i (N63TU3)
BMW G15 M850i (N63TU3)
STAGES 1–3
N63TU3
From $495
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BMW G16 840i Gran Coupe — Custom BM3 Tune (B58)
BMW G16 840i Gran Coupe — Custom BM3 Tune (B58)
STAGES 1–3
B58
From $495
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BMW G16 M850i (N63TU3)
BMW G16 M850i (N63TU3)
STAGES 1–3
N63TU3
From $495
BMW G20 330i — Custom BM3 Tune
BMW G20 330i — Custom BM3 Tune
STAGES 1–3
B48
From $495
BMW G20 M340i — Custom BM3 Tune
BMW G20 M340i — Custom BM3 Tune
STAGES 1–3
B58
From $495
BMW G21 330i Touring — Custom BM3 Tune
BMW G21 330i Touring — Custom BM3 Tune
STAGES 1–3
B48
From $495
BMW G21 M340i Touring — Custom BM3 Tune
BMW G21 M340i Touring — Custom BM3 Tune
STAGES 1–3
B58
From $495
BMW G22 430i — Custom BM3 Tune
BMW G22 430i — Custom BM3 Tune
STAGES 1–3
B48
From $495
BMW G22 M440i — Custom BM3 Tune
BMW G22 M440i — Custom BM3 Tune
STAGES 1–3
B58
From $495
BMW G23 430i Convertible — Custom BM3 Tune
BMW G23 430i Convertible — Custom BM3 Tune
STAGES 1–3
B48
From $495
BMW G23 M440i Convertible — Custom BM3 Tune
BMW G23 M440i Convertible — Custom BM3 Tune
STAGES 1–3
B58
From $495
BMW G26 430i Gran Coupe — Custom BM3 Tune
BMW G26 430i Gran Coupe — Custom BM3 Tune
STAGES 1–3
B48
From $495
BMW G26 M440i Gran Coupe — Custom BM3 Tune
BMW G26 M440i Gran Coupe — Custom BM3 Tune
STAGES 1–3
B58
From $495
BMW G29 Z4 M40i — Custom BM3 Tune
BMW G29 Z4 M40i — Custom BM3 Tune
STAGES 1–3
B58
From $495
BMW G29 Z4 sDrive30i — Custom BM3 Tune
BMW G29 Z4 sDrive30i — Custom BM3 Tune
STAGES 1–3
B48
From $495
BMW G30 530i / 530i xDrive — Custom BM3 Tune
BMW G30 530i / 530i xDrive — Custom BM3 Tune
STAGE 1
B48
$495
BMW G30 540i — Custom BM3 Tune
BMW G30 540i — Custom BM3 Tune
STAGES 1–3
B58
From $495
BMW G30 M550i — Custom BM3 Tune (N63TU)
BMW G30 M550i — Custom BM3 Tune (N63TU)
STAGES 1–3
N63TU
From $495
BMW G31 530i Touring — Custom BM3 Tune
BMW G31 530i Touring — Custom BM3 Tune
STAGES 1–3
B48
From $495
BMW G31 540i Touring — Custom BM3 Tune
BMW G31 540i Touring — Custom BM3 Tune
STAGES 1–3
B58
From $495
BMW G42 230i — Custom BM3 Tune
BMW G42 230i — Custom BM3 Tune
STAGES 1–3
B48
From $495
BMW G42 M240i — Custom BM3 Tune
BMW G42 M240i — Custom BM3 Tune
STAGES 1–3
B58
From $495
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BMW G70 740i — Custom BM3 Tune (B58)
BMW G70 740i — Custom BM3 Tune (B58)
STAGES 1–3
B58
From $495
BMW G80 M3 — Custom BM3 Tune (S58)
BMW G80 M3 — Custom BM3 Tune (S58)
STAGES 1–3
S58
From $495
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BMW G81 M3 Touring — Custom BM3 Tune (S58)
BMW G81 M3 Touring — Custom BM3 Tune (S58)
STAGES 1–3
S58
From $495
BMW G82 M4 — Custom BM3 Tune (S58)
BMW G82 M4 — Custom BM3 Tune (S58)
STAGES 1–3
S58
From $495
BMW G83 M4 Convertible — Custom BM3 Tune (S58)
BMW G83 M4 Convertible — Custom BM3 Tune (S58)
STAGES 1–3
S58
From $495

Not sure which chassis is yours? Set your car in the picker — we'll filter the store to parts that fit.

Set vehicle
ANSWERED

Before 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.