Brian Crower 94.4mm Unbalanced Billet Crankshaft for R35 GT-R - BC5249U

Billet crankshaft for the Nissan VR38DETT engine

94.4mm stroke for custom stroker engine combinations

Supplied as the unbalanced version for professional balancing

Designed for extreme-horsepower, high-boost, and high-RPM builds

Large-radius journals improve rigidity under elevated cylinder pressure

Gun-drilled and CNC-finished oil passages

Cross-drilled priority oiling supports rod-bearing lubrication

Teardrop-style oil passages improve oil pickup

Micropolished journals promote bearing lubricity

Stress relieved and shot peened

Magnaflux inspected for material integrity

Multi-step nitrided for improved surface durability

Profiled counterweights reduce crankcase windage and oil resistance

Intended for professional engine machining, balancing, and assembly

Brand: Brian Crower

Part Type: Crankshaft

Part Number: BC5249U

Engine: Nissan VR38DETT

Crankshaft Design: Billet stroker crankshaft

Material: EN40billet steel

Stroke: 94.4mm

Rod Journal Diameter: 56mm

Main Journal Diameter: 65mm

Weight: 44.6 lb

Balance Configuration: Unbalanced version for custom rotating-assembly balancing

Machining Process: Five-axis CNC machined

Machining Tolerance: Up to 0.0001 inch

Journal Design: Large-radius journals

Oil Passage Design: Gun drilled, CNC ground, teardrop shaped, and cross drilled

Oiling Configuration: Priority main-to-rod oiling

Journal Finish: Micropolished

Heat Treatment: Multi-step nitrided

Additional Treatments: Stress relieved and shot peened

Inspection Method: Magnaflux inspected

Counterweight Design: Fully profiled for reduced crankcase windage

Power Rating: No fixed horsepower rating published

Recommended Use: Extreme-horsepower, high-boost, and high-RPM VR38DETT builds

Installation Requirement: Professional machining, balancing, clearance verification, and engine assembly required

Brian Crower, commonly known as BC, is an American performance-parts manufacturer specializing in internal engine components for sport-compact, import and racing applications. The company was founded by Brian Crower, who previously led the Sport Compact division at Crower Cams & Equipment and also worked as an IndyCar mechanic. BC was created to provide complete, matched engine-building solutions that combine performance, reliability and accessible pricing. Its product range includes camshafts, valve springs, retainers, valves, connecting rods, crankshafts and complete stroker kits. Components are developed using CNC machining and grinding, precision inspection, metallurgy testing and dyno testing to help maintain accurate tolerances in high-RPM and high-horsepower engines.

For Nissan Skyline GT-R and Nissan GT-R engine builds, Brian Crower offers performance components for the RB26DETT and RB30-based combinations used in R32, R33 and R34 projects, along with VR38DETT components for the R35 GT-R. Available products include BC camshafts, valvetrain upgrades, billet crankshafts, forged connecting rods and stroker kits designed for increased displacement, boost and engine speed. BC’s VR38 stroker combinations can include an EN30B billet crankshaft, forged rods and custom pistons, while its RB catalog supports everything from upgraded valvetrain setups to complete bottom-end builds. Exact fitment and supporting modifications vary by product, making proper part selection and professional engine assembly especially important.

Brian Crower does not publish a fixed-duration manufacturer’s warranty for its performance engine components. Its official warranty disclaimer states that, because BC cannot control product installation, engine setup or operating conditions, its products are sold without an expressed warranty or an implied warranty of merchantability or fitness for a particular purpose. Brian Crower also does not guarantee a specific level of product or engine performance.

Any product concern must be reviewed individually by Brian Crower. Warranty consideration may be denied when a product has been:

• Improperly installed or used
  
• Physically altered or modified
  
• Damaged by another component or installation issue
  
• Used outside its intended application
  

To report a possible defect, contact Elite GT-R Parts with your order number, Brian Crower part number, clear photographs and detailed installation or engine-build information. Do not install, modify, disassemble or return the component before receiving instructions. Labor, engine damage, vehicle downtime and other incidental or consequential expenses are not covered. Final eligibility and any available resolution are determined by Brian Crower after reviewing the product and circumstances.