CarBahn S63 Performance Engines
From brutally fast street builds to premium high-horsepower applications, CarBahn S63 engines are engineered to deliver the strength, refinement, and confidence required for BMW’s twin-turbo V8 platform. Each build is developed around your power goals, torque target, and intended use with the experience and engineering credibility expected from Steve Dinan and the CarBahn team.
Free Engine Consultation
Tell us about your build goals
to speak directly with an engine specialist.
Proven BMW V8 Expertise
Built on decades of BMW engine development and tuning experience led by Steve Dinan, delivering confidence for high-output street cars and demanding performance applications.
Built Around Your Power Goal
Every S63 engine is configured around your horsepower target, torque load, turbo system, fuel type, and intended use—from refined street performance to maximum-output builds.
Precision Hand Assembly
Each engine is hand-assembled by experienced builders using carefully selected components engineered for durability, consistency, and repeatable performance under extreme load.
Choosing the Right S63 Engine Build
Not every S63 build needs the same level of reinforcement. Your horsepower target, torque load, turbo system, fuel type, and how the car will actually be used all play a role in determining the right engine configuration.
In this video, Steve Dinan walks through how we approach engine development at CarBahn and how to think about selecting the right build — whether you're refining a high-performance street car or planning for a more serious high-output package.
If you're unsure where your build should land, our team can help you map out the right path.
Speak With an Engine SpecialistChoosing The Right S63 Build Path
S63 builds are best thought of in terms of how much power and torque you plan to carry. Most customers fall into one of two lanes: S2 for high-performance street builds, or R2 for maximum-output applications where strength under extreme load is critical.
Final engine configuration should always be based on your turbo system, fuel type, torque targets, and intended use. Every CarBahn S63 engine begins with a consultation to ensure the right build path.
S63 Engine Lineup
CarBahn S63 engines are offered in two primary configurations based on power and load targets. Both are engineered for BMW’s xDrive V8 platforms and built around real-world performance demands.
S63 Street S2
Up to 850 WHP / 750 WTQ
- Forged pistons (offset pin)
- Forged connecting rods
- High-performance valve springs
- Upgraded head studs
- Designed for aggressive street performance and upgraded turbo systems
S63 Race R2
1000+ WHP / 900–1000+ WTQ
- Forged pistons (centered pin)
- Forged connecting rods
- Racing valve springs
- Racing head and main studs
- Racing head gasket with lowered compression
- Built for extreme power and sustained high-load operation
S63N (F10 Platform)
Core: $10,500 | Refresh Kit: $4,595Applies to F06/F10/F12/F13 platforms. Refresh kit recommended based on mileage and wear condition.
S63M TU4 (F9X Platform)
Core: $15,000 | Refresh Kit: $5,095Applies to F90 M5, F91/F92/F93 M8, and F95/F96 X5M/X6M platforms.
What Cars Use The S63 Engine?
The BMW S63 is the twin-turbo V8 found in BMW’s modern high-performance M cars, spanning luxury sedans, grand touring models, and high-output xDrive SUVs. Below is a fitment guide for the most common factory S63 applications supported by CarBahn engine programs.
BMW M5
- 2012–2016 BMW F10 M5
- 2018–present BMW F90 M5
BMW M8 / 8 Series M Models
- 2020–present BMW F91 M8 Convertible
- 2020–present BMW F92 M8 Coupé
- 2020–present BMW F93 M8 Gran Coupé
BMW X5 M / X6 M
- 2020–present BMW F95 X5 M
- 2020–present BMW F96 X6 M
Earlier S63 Applications
- Select F06 / F12 / F13 M6 applications
S63 fitment can vary by generation and engine revision, including S63N and later TU-based variants. If you are unsure which S63 version your vehicle uses, contact our team with your VIN and build goals and we will help confirm the right engine path.
Why CarBahn S63 Engines
These are not generic V8 builds designed around a universal formula. Every CarBahn S63 engine is engineered around torque load, horsepower targets, turbo configuration, fuel type, and the real-world demands of high-performance BMW M platforms.
BMW V8 Engineering Expertise
Every CarBahn engine is built using decades of BMW engine development experience led by Steve Dinan, with a process shaped by both high-performance street applications and motorsport engineering.
Built For High Load
From S2 street builds to 1000+ horsepower R2 configurations, each engine is designed around torque load, cylinder pressure, and sustained performance under demanding conditions.
Consultation Before Order
We review your vehicle platform, turbo system, fuel setup, intended use, and core strategy before finalizing the correct build path so the engine matches the application.
Engine Warranty & Additional Information
CarBahn S63 engines are engineered to support substantial horsepower and torque while maintaining durability. Long-term reliability depends heavily on the calibration, torque load, fuel system, turbo system, and supporting components used with the engine package.
S2 Engines with CarBahn Software
All S2 S63 engines are designed as road car engine packages and are covered for 2 years or 24,000 miles, provided the engine is running a CarBahn tune and no other vehicle components have caused a premature failure.
S2 Engines with Another Company's Tune
S2 engines remain covered for 2 years or 24,000 miles provided the engine remains below the recommended torque limits listed on the product page. Failures caused by the tune, aftermarket fuel injection systems, turbo systems, or other supporting components are not covered.
If torque limits are exceeded, warranty coverage applies only to materials and workmanship. CarBahn retains sole discretion in determining the cause of failure.
R2 Engines
R2 engines are designed for competition or extreme-output environments and are covered for materials and workmanship only. Racing engines should be periodically rebuilt based on runtime, operating conditions, or mileage.
Warranty does not cover failures caused by tuning, fuel systems, turbo systems, or other aftermarket components. CarBahn retains full discretion in determining the cause of failure.
Engine Core Acceptance Parameters
All engines supplied for rebuilding must be a complete factory core from oil pan to valve cover.
Block Requirements
- No holes or cracks in casting
- No holes or cracks in covers
- No bore damage that cannot be honed out
- No thrust surface damage
- No journal surface damage
- No bolt hole damage that cannot be repaired
Cylinder Head Requirements
- No holes or cracks in casting
- No holes or cracks in covers
- No thrust surface damage
- No journal surface damage
- No bolt hole damage that cannot be repaired
Possible Additional Repair Charges
Additional charges may apply if the following items are damaged and cannot be serviced or repaired:
- Valves
- Crankshafts
- Camshafts
- Guides
- Valvetronic mechanism
- VANOS mechanism
RACING ENGINES MAY ALSO NOT BE LEGAL IN YOUR STATE. PLEASE CHECK WITH YOUR LOCAL LAWS PRIOR TO PURCHASE OR INSTALLATION.
Questions About The Process?
Common questions about CarBahn S63 engine builds, consultation, timelines, core requirements, and how we match the right configuration to your horsepower and torque goals.
How do I know which S63 build is right for me? +
The right build depends on how you use the car, your target power level, turbo system, fuel type, and long-term torque load. Our consultation process helps determine whether an S2 or R2 engine is the best fit for your application.
Do I need to send in my original engine core? +
In most cases, yes. If you are supplying a usable core, a deposit is typically required to begin work. Once your engine is received and inspected, that deposit is either applied to the purchase price or used to cover any required machining or replacement parts.
If preferred, CarBahn can also supply a replacement core based on current availability and platform-specific pricing.
What happens if my engine core has damage? +
Your core must meet CarBahn’s acceptance standards. If inspection reveals damage requiring machining, replacement parts, or repair work beyond a normal rebuild, those costs are applied accordingly.
Common additional-charge items include valves, crankshafts, camshafts, guides, Valvetronic components, and VANOS components.
How long does an S63 engine build take? +
Build timing depends on engine configuration, parts availability, machine work requirements, and current production scheduling. Higher-output S63 builds can vary depending on scope and platform.
The best way to get an accurate timeline is to submit the consultation form or call our team directly so we can review your intended setup and core situation.
Do I need the refresh kit? +
The Refresh Kit is typically recommended for higher-mileage engines or builds where surrounding wear components should be brought up to the same standard as the new internal assembly.
This is especially important on high-output S63 applications where heat, load, and sustained performance place greater demands on adjacent systems.
What tune should I run? +
For the strongest warranty position and best calibration alignment, we recommend running a CarBahn tune.
Other tunes may be used, but must remain within recommended torque limits. Failures caused by tuning, supporting fuel systems, or turbo-related components are not covered.
Are R2 engines covered under warranty? +
R2 engines are covered for materials and workmanship only and are designed for competition or extreme-output use. They should be serviced or rebuilt periodically based on runtime, mileage, and operating conditions.
Can I run an R2 engine on the street? +
R2 engine configurations may not be legal for use on public roads depending on your location. Always check local regulations and consult with our team before selecting a race-oriented configuration for a street-driven vehicle.
Still have questions? Submit the consultation form or call (866) 558-4314 x1 to speak with an engine specialist.