Close up HKS duralumin hard-anodized finish and 8-rib design
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HKS Pulley 8Rib-80mm

HKS
HKS12999-AK001
Superchargers
3 Units In Stock - Ships Next Business Day
$ 190.00
$ 190.00

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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