BMW B58 Head Gasket Keychain - M140i M340i Supra Stainless Memento

This stainless-steel head gasket keychain celebrates the BMW B58, BMW’s modern turbocharged 3.0-litre inline-six petrol-engine family. Introduced in 2015, the B58 combines 2,998 cc capacity, a single twin-scroll turbocharger, direct injection and six-cylinder smoothness across BMW, Toyota, Morgan and Ineos applications.

Engine Identity

Manufacturer: BMW AG.
Engine family: BMW B58.
Common variants: B58B30M0, B58B30O0, B58B30M1, B58B30O1, B58B30M2 and B58B30O2; specification varies by generation, vehicle and market.
Configuration: Longitudinal or transverse, water-cooled turbocharged inline-six petrol engine.
Cylinder count: 6
Displacement: 2,998 cc / 3.0 litres.
Production period: 2015 onwards.
Valvetrain: DOHC, four valves per cylinder, 24 valves total, with Double VANOS variable cam timing and Valvetronic variable valve lift.
Fuel system: Direct petrol injection.
Induction: One twin-scroll turbocharger serving all six cylinders.

The B58 is part of BMW’s modular engine family and shares design principles with the B48 petrol four-cylinder and B57 diesel six-cylinder. It uses an 82.0 mm bore and 94.6 mm stroke, giving it an undersquare 2,998 cc layout.

Vehicle Compatibility Matrix

The B58 has been installed in numerous BMW Group and partner-brand vehicles. The applications below are significant examples, rather than a claim to list every market-, power- or model-year-specific fitment.

B58 variant / output band	Vehicle	Chassis	Years	Typical factory output
B58B30M0	BMW 340i / 340i xDrive	F30/F31	2015–2019	326 PS / 450 Nm in European specification.
B58B30M0	BMW 440i / 440i xDrive	F32/F33/F36	2016–2020	326 PS / 450 Nm in European specification.
B58B30M0	BMW 540i / 540i xDrive	G30/G31	2017–2020	340 PS / 450 Nm in European specification.
B58B30O1	BMW M240i, M340i and M440i	F22/F23; G20/G21; G22/G23/G26	2016 onwards	Approximately 340–374 PS, depending on model year and market.
B58B30O1	BMW X3 M40i and X4 M40i	G01/G02	2018 onwards	Approximately 360–374 PS, depending on model year and market.
B58B30O1	BMW Z4 M40i	G29	2018 onwards	340 PS / 500 Nm in early European specification.
B58B30O1	Toyota GR Supra 3.0	A90/A91	2019 onwards	Output varies by market and model year; early European models were rated at 340 PS.
B58 variants	BMW 640i, 740i, 840i, X5, X6, X7 and 8 Series	G-chassis applications	2017 onwards	Multiple B58 calibrations, typically 333–381 PS before later updates.
B58 variants	Morgan Plus Six	CX-generation	2019 onwards	BMW B58-powered application; specification varies by model year.
B58 variants	Ineos Grenadier and Quartermaster	GM1	2022 onwards	BMW-supplied B58 application; market and model-year outputs vary.

The B58 was not fitted to the F80 M3 or F82 M4; those cars used the related but distinct twin-turbo S55 engine. Confirm the engine code from the vehicle’s VIN or under-bonnet identification label before using a head-gasket profile for technical reference.

Why This Engine Matters

The B58 succeeded BMW’s N55 inline-six and became one of BMW’s most widely used modern performance petrol engines. Its closed-deck block, single twin-scroll turbocharger and integrated water-to-air intercooler design provide a strong foundation for both factory performance and enthusiast tuning.

The engine’s breadth is part of its appeal: it powers BMW saloons, coupés, SUVs and roadsters, as well as the Toyota GR Supra, Morgan Plus Six and Ineos Grenadier. Factory outputs vary from around 326 PS in early BMW 340i applications to 374 PS in later M Performance models, with mild-hybrid and technical-update variants continuing to evolve.

Technical Specifications

Specification	BMW B58 reference architecture
Capacity	2,998 cc / 3.0 litres.
Configuration	Turbocharged inline-six petrol engine.
Cylinder head	DOHC, four valves per cylinder; 24 valves total.
Bore x stroke	82.0 x 94.6 mm.
Compression ratio	11.0:1 in early B58B30M0 reference specification.
Induction	Single twin-scroll turbocharger.
Fuel system	Direct petrol injection.
Valve technology	Double VANOS variable cam timing and Valvetronic variable valve lift.
Cylinder block	Closed-deck architecture.
Charge-air cooling	Water-to-air intercooler integrated into the intake plenum.
Firing order	1-5-3-6-2-4.
Example B58B30M0 output	326 PS / 240 kW at 5,500–6,500 rpm; 450 Nm from 1,380–5,000 rpm.
Example B58B30O0 output	340 PS / 250 kW at 5,500 rpm; 500 Nm from 1,520–4,500 rpm.
Higher-output B58TU example	374 PS / 275 kW; 500–520 Nm, depending on B58TU version and application.

The technical data above is not a universal B58 specification sheet: output, torque, injection pressure, exhaust treatment, cooling and electrification differ between B58 generations and engine codes. A 2016 B58B30M0 BMW 340i, a 2020 B58TU Toyota GR Supra and a current mild-hybrid BMW use the B58 architecture but should not be assumed to share all service parts.

Product Details

Stainless-steel head gasket keychain inspired by the BMW B58 3.0-litre turbocharged inline-six cylinder-head gasket profile.
Designed for B58-powered BMW, Toyota GR Supra, Morgan and Ineos enthusiasts.
Finished using our three-stage vibratory polishing process for a smooth, durable metal finish.
Supplied on a plywood display card for gifting, collecting or display.
A compact tribute to BMW’s versatile, turbocharged modern straight-six.

FAQ

What is the BMW B58 engine?

The BMW B58 is a 2,998 cc, turbocharged inline-six petrol-engine family introduced in 2015. It uses direct injection, Double VANOS, Valvetronic and a single twin-scroll turbocharger.

Which cars use the BMW B58?

B58 engines are used in numerous BMW models, including 340i, 440i, M240i, M340i, 540i, 840i, X3 M40i, Z4 M40i and X5/X6/X7 variants, as well as the Toyota GR Supra, Morgan Plus Six and Ineos Grenadier.

Is the B58 the same as the S58?

No. The B58 is BMW’s single-turbo 3.0-litre inline-six family, while the S58 is the higher-performance BMW M twin-turbo derivative used in vehicles such as the G80 M3 and G82 M4.

Is this a functional replacement head gasket?

No. This is a decorative stainless-steel keychain inspired by the BMW B58 head-gasket shape; it is not an engine-service component.

B58 – BMW M140i, M340i & Supra Head Gasket Keychain