HKS Pulley Upgrade Kit

2013–2020 Subaru BRZ / 2013–2016 Scion FR-S / 2017–2020 Toyota 86

12002-KK001

Overview:

The HKS Pulley Upgrade Kit is a precision-engineered enhancement designed exclusively for use with the GT2 Supercharger Pro Kit (Ver.3) on Subaru BRZ, Scion FR-S, and Toyota 86 models from 2013 to 2020. This upgrade optimizes supercharger performance by installing a smaller diameter pulley, allowing your vehicle to unlock significantly more power when paired with the appropriate fuel setup.

Ideal for performance enthusiasts seeking to maximize the output of their supercharged 2.0L boxer engines, this kit supports fuel upgrades including E85, enabling substantial horsepower gains beyond the stock configuration. Whether you’re tuning for spirited street driving or track use, the HKS Pulley Upgrade Kit provides a reliable and effective power increase.

Key Features:

This pulley upgrade kit offers targeted improvements to your supercharger system, delivering enhanced performance and compatibility with higher-octane fuels.

• Designed exclusively as an optional upgrade for HKS GT2 Supercharger Pro Kit Ver.3 (part numbers 12001-KT003/KT004).
• Features a smaller diameter pulley to increase supercharger speed and boost pressure.
• Optimized for use with 91 octane gasoline or E85 fuel blends when combined with upgraded fuel pump and injectors.
• Enables up to +90% more power compared to stock output when properly configured.
• Supports a power output of approximately 255 HP on RON91 gasoline (+80 HP over stock).
• When combined with E85 fuel, upgraded fuel pump, and injectors, power can reach around 320 HP (+150 HP over stock).
• Precision manufacturing ensures reliable fitment and consistent performance gains.
• Maintains compatibility with factory supercharger mounting points and components.

Construction & Design:

The pulley is crafted with high-quality materials to withstand the increased rotational speeds and stresses associated with supercharger upgrades. Its smaller diameter design is engineered to optimize boost delivery without compromising reliability. This upgrade integrates seamlessly with the existing GT2 Supercharger Pro Kit hardware, ensuring a straightforward installation process and durable operation under demanding conditions.

Performance & Sound

• Delivers a significant horsepower increase, with up to +80 HP on 91 octane fuel and +150 HP when combined with E85 and supporting fuel system upgrades.
• Enhances throttle response and overall engine performance by increasing supercharger boost efficiency.
• Supports higher boost levels that translate to improved acceleration and power delivery.

Installation & Fitment:

This pulley upgrade kit is designed specifically for the following vehicles:

• Subaru BRZ (2013–2020)
• Scion FR-S (2013–2016)
• Toyota 86 (2017–2020)

Installation requires the existing HKS GT2 Supercharger Pro Kit Ver.3 (12001-KT003/KT004) to be installed first. The pulley replaces the standard supercharger pulley and is a bolt-on upgrade. No cutting, drilling, or special tuning is required for installation; however, tuning adjustments are recommended to optimize performance and ensure safe operation, especially when using E85 or racing fuels.

What’s Included

• High-performance small diameter pulley designed for HKS GT2 Supercharger Pro Kit Ver.3
• All necessary hardware for pulley installation
• Installation instructions

Ideal For:

This upgrade is perfect for enthusiasts who have already installed the HKS GT2 Supercharger Pro Kit and want to maximize power output, especially when running higher-octane or E85 fuels. It suits drivers focused on track performance, spirited street driving, and those seeking substantial horsepower gains without extensive engine modifications.

HKS is a Japanese company specializing in high-performance aftermarket automotive parts, including turbochargers, exhaust systems, suspension kits, and electronic control units. Their products are designed for enthusiasts seeking to enhance vehicle performance, offering reliable and precise components for various builds and driving scenarios.