HKS Supercharger Pulley
HKS Supercharger Pulleys: Precision Boost Tuning from a Forced Induction Pioneer
When it comes to fine-tuning forced induction performance, few names carry more weight than HKS. Founded in 1973 by Hiroyuki Hasegawa, a former Yamaha Motor Company engineer, and his partner Goichi Kitagawa — with startup capital supplied by Sigma Automotive — HKS was built from the ground up around one goal: designing and building high-performance engines and components that major original equipment manufacturers could not, or would not, produce. Supercharger pulleys sit squarely in that tradition.
The Role of a Supercharger Pulley in Performance Tuning
A supercharger pulley is one of the most direct, mechanical ways to adjust the output of a positive-displacement forced induction system. To adjust the output of the HKS GT Supercharger, it is done by adjusting the supercharger RPM depending on the engine specification. Swapping to a smaller-diameter pulley spins the supercharger faster, raising boost pressure and increasing power output — but it must be done within safe operating limits. When using the HKS GT Supercharger, the maximum RPM of the supercharger must be within the maximum allowable RPM of each unit. This is precisely why HKS engineers the math and the hardware together, offering pulleys that are purpose-built for their own supercharger systems rather than generic, one-size-fits-all components.
HKS GT Series Supercharger Pulleys
HKS offers their supercharger pulleys as part of the broader GT Supercharger ecosystem. The HKS GT Supercharger Pulley is produced exclusively for HKS GT Superchargers, and this 8-rib pulley is universal, fitting a variety of HKS Superchargers across many models — including the VQ35DE Supercharger GT Pro Kit. The 8-rib belt profile is a critical design choice: it provides substantially more grip surface than a standard 6-rib setup, reducing belt slip under high-boost conditions and ensuring consistent, reliable power transfer.
The lineup spans multiple diameters — including 80mm, 95mm, 100mm, 110mm, and 120mm options under the GT Supercharger Pulley line — giving builders the flexibility to dial in the exact boost level their fuel system, intercooler, and engine tune can support. For owners of the HKS GT2 Supercharger platform, a dedicated high-boost 80mm pulley is also available, making it a strong option for ND1 Miata builds equipped with the GT2 Supercharger, or ND2 builds running supplemental fueling.
The HKS GT Super Charger Pulley Upgrade Kit is also available for the 2013+ Subaru BRZ, 2013–2016 Scion FR-S, and 2017+ Toyota 86 as an upgrade kit for the HKS V3 Supercharger kit. This makes it straightforward for existing HKS supercharger owners to step up their boost without replacing the entire forced induction system.
Why Choose HKS for Supercharger Pulleys?
The engineering credibility behind HKS pulleys goes well beyond the parts themselves. HKS received the ISO 9001 quality management standard certification in 2010, certifying manufacturing standards for both OEM and contract clients. For over a quarter century, HKS products have been put to the test in drag racing, road racing, rallying, and top speed trials — and HKS-equipped vehicles have captured numerous racing championships using many "off the shelf," race-proven HKS components. When you install an HKS pulley, you're not just bolting on a piece of aluminum — you're tapping into decades of real-world forced induction development and motorsport validation.