Description
Part Number: BC5239
Brian Crower Nissan RB26/RB25 4340 Billet Crankshaft (79mm Stroke)
Engineered from aerospace-grade 4340 billet steel to provide unmatched rotational integrity, oil flow, and structural strength for high-boost, high-RPM RB26DETT and RB25DET engine builds.
Key Features
- ☑ Precision CNC machined from high-tensile 4340 billet steel for ultimate durability.
- ☑ Increased 79mm stroke geometry delivers displacement gains while maintaining high-rev stability.
- ☑ Large radius journals add critical rigidity to withstand extreme horsepower and boost pressures.
- ☑ Gun-drilled and cross-drilled main oiling with tear-dropped scoops for optimal bearing lubrication.
- ☑ Fully profiled counterweights designed to minimise crankcase windage and rotational resistance.
- ☑ Multi-step heat treatment: stress relieved, shot peened, magnaflux inspected, nitrided, and micro-polished.
Technical Specifications
| Manufacturer | Brian Crower (BC) |
|---|---|
| Part Number | BC5239 |
| Engine Compatibility | Nissan RB26DETT / RB25DET |
| Material | 4340 Billet Steel |
| Stroke | 79mm |
| Main Journal Diameter | 55mm |
| Rod Journal Diameter | 48mm |
| Surface Treatment | Nitrided, Shot Peened, Magnafluxed & Micro-Polished |
What’s Included in the Box
- 1x Brian Crower BC5239 4340 Billet Crankshaft (79mm Stroke)
- Manufacturer Quality Inspection & Specification Sheet
Brian Crower is renowned worldwide for producing top-tier internal engine components built for demanding motorsport environments. At JP Racing, we supply authentic Brian Crower components across the UK, supported by expert technical assistance and fast dispatch.
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