RB26DETT and RB25DET builders looking for increased displacement without going to the extreme of a full 79mm stroker turn to the Brian Crower 73.7mm Billet Crank Bottom End Kit. This 2.63L package includes a precision 4340 billet crankshaft with a 73.7mm stroke, ProH2K connecting rods measuring 4.783 inches center-to-center, and custom forged aluminum pistons with your choice of bore and compression ratio. The complete system-matched setup also features premium alloy wrist pins, a full ring pack, ARP fasteners, and ACL race bearings (available separately), delivering a fully balanced assembly that installs correctly the first time.
Brian Crower’s engineering ensures every component works in perfect harmony. The billet crank reduces rotating mass for quicker revving while the custom pistons and longer rods optimize compression and rod-to-stroke ratios for efficient power production. This 2.63L configuration is ideal for builders aiming for strong mid-range torque and reliable high-output performance with upgraded turbos, heads, and fuel systems, providing a smart step up in displacement for both street and track applications.
At Terra Firma Automotive, we supply this genuine Brian Crower 73.7mm Billet Crank Bottom End Kit as a premium displacement upgrade for serious RB26 and RB25 enthusiasts. It transforms your engine into a larger, more powerful unit while maintaining the legendary character of the Skyline GT-R platform. For builders ready to take their R32, R33, or R34 to the next level of performance, this stroker kit delivers the quality, precision, and power potential that only Brian Crower can provide.
- Brian Crower RB26/RB25 Bottom End Kit with 73.7mm billet crank
- Increases displacement to 2.63L for strong torque gains
- 4340 billet crankshaft with 73.7mm stroke
- ProH2K (Sportsman) connecting rods at 4.783 inches center-to-center
- Custom forged aluminum pistons with choice of bore and compression
- Premium alloy wrist pins, full ring pack, and ARP fasteners
- ACL race bearings available separately
- Fully balanced, system-matched assembly for easy installation
- Ideal foundation for high-boost and high-horsepower RB builds
- Optimizes rod-to-stroke ratio for efficient power production
- Reduces rotating mass for quicker revving and response
- Premium Brian Crower engineering with proven real-world results
- Direct upgrade for R32, R33, and R34 GT-R engines
- Supports upgraded turbos, heads, and fuel systems
- Transforms your RB engine into a larger, more powerful unit
- Trusted by professional builders for reliability and performance
- ⚠️ Emissions / California Legal Disclaimer – Off-Road / Competition Use Only: This product is intended for off-road, competition, and track use only. It is not legal for sale or use on public roads or highways in California (or any other CARB-adopting state). For more information Click Here.
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