4.0-Liter BMW S38B35 High-Performance Engine – Fully Rebuilt by The Power Plant, Greensboro NC
This BMW S38B35 inline-six engine, originally developed for the BMW M5 (E28/E34) and M6 (E24), has been expertly rebuilt and enlarged to 4.0 liters by Henry Lawrence of The Power Plant in Greensboro, North Carolina. Acquired by the current owner approximately one year ago, this high-performance unit has been custom-built for motorsport or restomod applications and has zero running hours since completion.
The legendary BMW S38 engine, known for its robust cast-iron block, aluminum 24-valve head, and dual overhead camshafts, has been elevated to modern racing specifications through a comprehensive rebuild using premium forged internals and precision machining. Every component has been optimized for durability, high-rev capability, and superior oil management under extreme conditions.
This build increases displacement to 4.0 liters with a custom billet crankshaft, Wiseco forged pistons, and Crower connecting rods. Performance upgrades include Supertech racing valve springs, custom high-lift camshafts, and adjustable cam gears for exact timing control. The addition of a billet dry-sump oil pan ensures optimal lubrication for continuous high-load operation, making this engine ideal for competitive or enthusiast-level builds.
Perfect for BMW M5, M6, or custom racing and restomod projects, this S38 delivers the best of BMW’s motorsport heritage with cutting-edge performance refinement.
Technical Specifications
Engine Code: BMW S38B35 (Modified to 4.0L Specification)
Displacement: 4.0 liters (Expanded from 3.5L)
Configuration: Inline-six (I6)
Bore x Stroke: 95 mm x 94.5 mm
Block Material: Cast Iron
Cylinder Head Material: Aluminum Alloy
Valvetrain: DOHC – 24 valves (4 per cylinder)
Compression Ratio: Estimated ~11.0:1 (depending on piston setup)
Fuel System: Multi-point Electronic Injection (ECU-ready)
Ignition System: Coil-on-Plug Compatible
Lubrication: Billet Dry-Sump Oil Pan Conversion
Builder: Henry Lawrence – The Power Plant, Greensboro NC
Condition: Fresh rebuild, 0 miles since assembly
Performance & Internal Components
Custom Billet Steel Crankshaft (94.5mm stroke)
Crower Forged Connecting Rods
Wiseco 95mm Forged Pistons, Rings, and Pins
Supertech Racing Valve Springs and Retainers
Custom Racing Camshafts (13.2mm intake lift / 12.5mm exhaust lift)
Oversized Valves: 39mm Intake / 33mm Exhaust
Adjustable Camshaft Gears
Custom Timing Chain Sprocket and Dual-Row Timing Chain
MLS Multi-Layer Steel Head Gaskets
Billet Dry-Sump Oil Pan Assembly
Ported Cylinder Head for optimized airflow
Balanced Rotating Assembly for high-RPM operation
Compatibility
BMW M5 (E28, E34)
BMW M6 (E24)
Custom race builds, restomods, or BMW conversions
Suitable for track, endurance, and performance applications
Condition
Professionally rebuilt and blueprinted
Zero runtime since completion
Stored in a climate-controlled facility
Turn-key ready for installation in your project
Edouard Colin (verified owner) –
Après plusieurs centaines de kilomètres, le moteur fonctionne toujours parfaitement. Je suis entièrement satisfait de cet achat.
Lucy Spencer (verified owner) –
The replacement engine looked exactly like the photos on the website. After installation, it started immediately and has been running perfectly ever since.
Alexandre Michel (verified owner) –
Très bonne expérience d’achat. Les réponses du service client étaient rapides et précises, ce qui m’a permis de commander en toute confiance.
Laurent Hubert (verified owner) –
La boîte de vitesses fonctionne comme une neuve. Je retrouve enfin le plaisir de conduire ma BMW au quotidien.
Yann Caron (verified owner) –
C’est la deuxième fois que je commande sur ce site et je suis une nouvelle fois très satisfait. Service sérieux et produits de qualité.
Romain Vincent (verified owner) –
J’ai remplacé les plaquettes de frein sur ma BMW X1 et la différence est immédiate. Freinage silencieux, efficace et installation très simple.
Philip Turner (verified owner) –
The replacement fender was an exact match for my original one. My body shop had no trouble fitting it, and the final result looks factory installed.
Alexandre Michel (verified owner) –
Le moteur démarre parfaitement et fonctionne de manière très silencieuse. Les performances sont excellentes depuis le remplacement.
Luke Daniels (verified owner) –
I purchased a transmission for my 528i, and it’s been performing perfectly since installation. Gear changes are smooth, and the vehicle drives better than it has in a long time.
Kyle Roberts (verified owner) –
I’ve recommended this company to several friends because every order I’ve placed has been accurate, professionally packaged, and delivered on time.
Allison Foster (verified owner) –
This was my first time ordering BMW parts online, and the experience couldn’t have been better. Great customer service and outstanding product quality.
Jack Harrison (verified owner) –
The replacement gearbox works perfectly. After several weeks of driving, shifting remains smooth and consistent.
Anthony Graham (verified owner) –
If you’re looking for dependable BMW parts, this is definitely a company you can trust. The combination of quality products, knowledgeable support, fair pricing, and reliable shipping keeps me coming back whenever I need parts for my BMW.
Leonardo Navarro (verified owner) –
The transmission I received was clean, well packaged, and arrived on time. After installation, shifting is smooth and everything works exactly as expected.
Richard Evans (verified owner) –
I appreciated how the support team confirmed compatibility before shipping. Their professionalism gave me confidence that I was ordering the correct parts.
Jaime Aguilar (verified owner) –
The brake pads were exactly what I needed. Installation was quick, braking performance feels excellent, and there has been no excessive brake dust or noise.
Tomás Villanueva (verified owner) –
I ordered several maintenance parts along with brake pads, and everything arrived together in perfect condition. Very organized and professional service.
Javier Cárdenas (verified owner) –
The replacement transmission was exactly as described. After installation, the car shifts smoothly, and there haven’t been any issues at all.
Austin Parker (verified owner) –
I was looking for a reliable transmission for my BMW 328i, and this one has performed flawlessly since installation. Gear shifts are smooth, and there have been no warning lights or leaks.
Quentin Mercier (verified owner) –
Le pare-chocs arrière est identique à l’origine. Mon garage a pu le monter très facilement grâce à un ajustement parfait.
Alfie Morgan (verified owner) –
Finding reliable BMW parts online isn’t always easy, but this company delivered exactly what was promised.
Leo Edwards (verified owner) –
The transmission was exactly as advertised. It has restored smooth driving, and the installation process was straightforward.
Megan Howard (verified owner) –
I’ve purchased several BMW engines over the years from different suppliers, and this has been one of the best experiences. Honest descriptions, quality products, and professional service.
Pierre Dubois (verified owner) –
J’ai remplacé les plaquettes de frein sur ma BMW X1 et la différence est immédiate. Freinage silencieux, efficace et installation très simple.
David Marshall (verified owner) –
The transmission was exactly as advertised. It has restored smooth driving, and the installation process was straightforward.
Iván Castillo (verified owner) –
Excellent communication throughout the ordering process. I received tracking updates regularly, and every question I had was answered quickly.
Fabien Lemaire (verified owner) –
Très satisfait de la qualité des matériaux utilisés. Les finitions sont impeccables et le montage s’est déroulé sans difficulté.
Samuel Faure (verified owner) –
Très bon rapport qualité-prix. Les pièces sont fiables et nettement moins chères que chez le concessionnaire.
Cedric Aubry (verified owner) –
Les pièces correspondent parfaitement aux photos publiées sur le site. Aucune mauvaise surprise à la réception.
Jean Dupont (verified owner) –
Grâce à la vérification de mon VIN avant l’expédition, j’ai reçu exactement les bonnes pièces pour mon véhicule. Un service vraiment appréciable.
Sebastien Lefevre (verified owner) –
Les jantes sont magnifiques et de très bonne qualité. Elles correspondent exactement aux photos du site et donnent un nouveau look à ma voiture.