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B58
Gen 1 / Gen 2B58-powered BMW applications
Examples: M240i, 340i, 440i, M340i and M440i
Select Gen 1 or Gen 2, then S2 or R2. Confirm the actual engine generation before choosing your kit.
BUILD YOUR B58 KIT
CARBAHN ENGINE KITS
Power starts
inside.
Forged internal components, supporting hardware and optional machining and assembly. Find the CarBahn parts kit that fits your BMW engine—and the build you have in mind.
6 ENGINE FAMILIESROTATING + COMPLETE PARTS KITSOPTIONAL BUILD SERVICES
ENGINEERED FROM THE INSIDE OUT.S58 KIT SHOWN
01 / START WITH YOUR PLATFORM
Find your foundation.
Select your engine family to explore configurations, see exactly what’s included and build your parts-and-service package.
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S55
S2 / R2M2 Competition / CS · M3 · M4
F87 M2 Competition / CS · F80 M3 · F82/F83 M4
Street and race kit choices for S55 builds. The original F87 M2 uses a different engine.
BUILD YOUR S55 KIT
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S58
S2 / S3 / R2 / R3M2 · M3 · M4
G87 M2 · G80 M3 · G82/G83 M4
Choose a 3.0L configuration or a 3.2L stroker, with street and race specifications offered in the builder.
BUILD YOUR S58 KIT
V8
S63
F10 / F90 M5M5
F10 M5 · F90 M5
Select the chassis, then the F90 block version where applicable. S2 and R2 configurations available.
BUILD YOUR S63 KIT
V8
S65
4.2L / 4.6LM3
E90 / E92 / E93 M3
Choose 4.2L or a 4.6L stroker. Both stroker kit types include a billet crankshaft; optional cams are available.
BUILD YOUR S65 KIT
V10
S85
5.2L / 5.8LM5 · M6
E60 M5 · E63/E64 M6
Choose 5.2L or a 5.8L stroker. Billet crankshaft included in both 5.8L kits; optional cams are available.
BUILD YOUR S85 KIT
Match the engine, not just the badge. Models above are an engine-family guide. Confirm your exact engine, generation and block configuration in the builder. For replacement engines or uncertain fitment, contact CarBahn before ordering.
02 / TWO WAYS TO START
The right parts.
The right scope.
Start with the internal foundation or expand to the engine-specific complete parts kit. Then add supporting hardware and services to suit your build.
01
THE INTERNAL FOUNDATION
Forged rotating assembly
The core internal components for your selected engine configuration. A starting point when your build focuses on the bottom end.
- Forged pistons and performance bearings
- Forged rods or upgraded rod bolts, depending on the kit
- Billet crankshaft where specified for a stroker kit
- Engine-specific inclusions shown in the builder
02
THE EXPANDED PARTS PACKAGE
Complete parts kit
The selected internal foundation, expanded with cylinder-head components and supporting performance parts specified for that engine.
- Rotating assembly components for the selected configuration
- Head gaskets and performance valve springs
- Upgraded fasteners and additional hardware where specified
- Platform-specific components listed in the builder
“Complete” describes the parts kit.
Machining and assembly labor are separate selections. Your existing block, cylinder head and other retained components need to be evaluated for the intended build. Choose professional services in the platform builder when needed.
03 / UNDERSTAND THE HARDWARE
Every part has a job.
What’s inside matters. Here’s how the main components contribute to an engine build—and why the exact combination changes by platform.
The combustion connection.
Pistons transfer combustion force into the rotating assembly. Forged piston specifications—including pin placement and compression—vary with the selected kit and intended application.
Strength through the cycle.
Connecting rods link the pistons to the crankshaft. Depending on the kit, the build uses forged rods or upgraded rod bolts with retained rods.
Support the rotating core.
Rod and main bearings support the rotating components at their journals. Correct clearances, surface condition and lubrication are essential parts of assembly.
Keep the engine sealed.
Head gaskets seal the cylinder-head-to-block interface. Head studs and other upgraded fasteners are included where specified for the engine and configuration.
Control the valvetrain.
Valve springs help the valves follow the camshaft’s motion. Complete parts kits include the performance springs specified for that engine build.
Change the displacement.
A longer-stroke crankshaft changes piston travel. Selected stroker kits pair a billet crankshaft with the corresponding piston and rod configuration.
AVAILABLE ON SELECT CONFIGURATIONS
Take the camshaft conversation further.
Camshafts control valve opening and closing events. Optional camshaft kits are shown only where offered in each platform builder. Discuss the choice with your engine builder alongside the intended use, valvetrain and calibration.
04 / BUILD BEYOND THE BOX
Parts. Preparation.
Precision assembly.
Select the parts you need and the individual services your engine requires. Each platform builder keeps these choices and their prices visible.
Add what your
build needs.
Inspection determines what can be reused, what needs refreshing and which machining operations are appropriate.
Availability and pricing vary by engine and configuration.
OEM assembly parts kits
Engine-specific gaskets, seals, fasteners and supporting hardware for bottom-end or complete-engine assembly. Separate from assembly labor.
High-mileage / engine-failure refresh
Additional refresh components for higher-mileage engines or builds following a failure. Contents vary by platform and can include timing, cooling, oil-system and valvetrain parts. An inspection determines the full repair scope.
Cylinder boring & honing
Boring changes cylinder diameter where required; honing establishes the specified bore size and surface finish. The operation must suit the piston specification and cylinder-bore material. Available operations vary by engine.
Block decking & head surfacing
Separate machining operations on the block and cylinder head sealing surfaces, selected as needed after evaluating their condition and the build specification.
Valve jobs, guides & spring installation
Valve-seat work and decarbonizing support cylinder-head preparation. Guide replacement and sizing are selected where needed; performance spring installation is included with the applicable valve-job service.
Lower-end or complete-engine assembly
Choose lower-end assembly for a rotating-assembly build or complete-engine assembly for a complete parts kit. These are labor selections; machining and supporting parts remain individually selectable.
FROM PLAN TO PARTS LIST
Your next four moves.
- 01
Find your platform
Match your engine family, generation and block version.
- 02
Choose your configuration
Select the offered street, race or displacement option.
- 03
Set the build scope
Choose your parts kit, supporting hardware and services.
- 04
Review your build
Check the included parts and selected options in your engine builder.
05 / BEFORE YOU BUILD
A few good questions.
Get clear on the kit, the engine and the work before choosing your configuration.
Is a complete parts kit an assembled engine?
A complete parts kit supplies the components listed for that configuration. Machining and complete-engine assembly are separate options in the builder. Contact CarBahn if you’re looking for a complete engine program.
How do I confirm my engine and fitment?
Start with the platform guide above, then verify the engine designation and generation. For uncertain fitment, provide CarBahn with your VIN, build date and any engine replacement or modification history. A model badge alone does not identify every engine variation.
What’s the difference between S2/S3 and R2/R3?
On platforms where these options are offered, S-series and R-series kits have street- and race-focused internal specifications. Stroker configurations add displacement. Check each builder’s included parts and discuss the intended use with your engine builder. Not every platform offers every designation.
Why does the F90 S63 builder ask about the block?
The S63 kits distinguish earlier Alusil and later coated-bore configurations. The matching components and machining choices depend on the block. Year labels help you navigate, but the actual block should be confirmed—particularly for transition-year cars and replacement engines.
Does a kit include every part needed for my engine?
The builder lists the base kit contents. OEM assembly parts, refresh kits, optional upgrades and services are additional selections. Your engine’s condition and retained components determine the complete parts-and-labor scope.
What determines the finished engine’s horsepower?
The full combination matters: engine specification, induction, fuel, calibration, supporting systems and intended use. A parts kit alone does not establish the finished engine’s output. Confirm the complete plan with your engine builder before choosing a power target.
LET’S BUILD YOUR FOUNDATION.
Know your engine?
Start your build.
Explore the configurations. See the parts. Choose the services.