SKU: 12999-AK001
HKS 8-Rib 80mm Crank Pulley for Nissan Skyline GT-R R32-R34 RB26DETT RB25DET RB20DET
The HKS 12999-AK001 delivers a lightweight 80mm 8-rib crank pulley upgrade designed for Nissan RB26DETT RB25DET and RB20DET engines in Skyline GT-R R32 R33 R34 and other models. CNC-machined from duralumin with hard-anodized finish it drops rotational mass for sharper throttle response and quicker revs. The 8-rib belt drive grips firmly to manage higher boost in tuned RB engines while keeping alternator power steering and AC fully functional.
Key Features
- 80mm Diameter: Under stock size cuts parasitic drag for faster engine acceleration and improved efficiency across the rev range
- 8-Rib Design: Doubles belt contact area over stock 4-rib to prevent slip under 30+ psi boost in drag or track RB setups
- Duralumin Construction: Weighs just 350g with hard-anodized coating resists wear and corrosion for long-term high-rpm reliability
- Direct Bolt-On Fit: Bolts straight to factory crank location reuses OEM bolt and drives all stock accessories without modifications
- Mass Reduction: Drops over 1.2kg from stock 1620g pulley sharpening response in street daily or 1000hp RB builds
Product Notes
- Fits all Nissan RB26DETT RB25DET RB20DET engines requires matching 8-rib serpentine belt
- Pair with HKS 8-rib accessories for complete underdrive kit on high-power setups
- Made in Japan ships in official HKS retail box
Installation Notes
- Professional installation recommended.
- Estimated time 1-2 hours remove stock pulley install new with factory crank bolt
- Torque crank bolt to Nissan spec 240-260 Nm use impact gun and thread locker
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1989-1994 | Nissan | Skyline | R32 GT-R (RB26DETT) |
| 1995-1998 | Nissan | Skyline | R33 GT-R (RB26DETT) |
| 1999-2002 | Nissan | Skyline | R34 GT-R (RB26DETT) |
| 1993-1998 | Nissan | Skyline | R33 GTS-T (RB25DET) |
| 1998-2002 | Nissan | Skyline | R34 GTT (RB25DET) |
| 1996-2001 | Nissan | Stagea | WC34 260RS (RB25DET) |
| 1989-1994 | Nissan | Skyline | R32 GTS/GTS-t (RB20DET) |
| 1988-1994 | Nissan | Cefiro | A31 (RB20DET) |
Why Choose HKS?
- Japan’s premier performance parts manufacturer since 1973
- Proven on the highest-horsepower RB engines worldwide
- Made in Japan with legendary quality
Frequently Asked Questions
- Q: Does it fit R34 GT-R RB26DETT and include belt?
A: Yes direct fit for R34 GT-R RB26DETT belt sold separately as HKS 8-rib conversion kit. - Q: What material and finish for durability?
A: CNC duralumin hard-anodized black finish withstands heat and boost without cracking. - Q: Warranty and daily drive safety?
A: 1-year limited warranty safe for street use with minimal accessory speed increase.
Shipping & Handling
- Method: UPS/FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Official HKS retail box 6x6x4 inches
- Weight: 0.8 lb shipped (350g product)
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