Perrin PSP-ENG-106BK Lightweight Crank Pulley Black for Subaru FA/FB Small Hub

Vehicle Fitment

• 2022-2025 Subaru WRX (2.4L FA24F H4 Turbo)
• 2022-2025 Subaru BRZ (2.4L FA24 H4)
• 2022-2025 Toyota GR86 (2.4L FA24 H4)
• 2017-2025 Subaru Crosstrek (2.0L FB20 / 2.5L FB25 H4)
• 2019-2025 Subaru Ascent (2.4L FA24F H4 Turbo)
• 2020-2025 Subaru Outback XT (2.4L FA24F H4 Turbo)
• 2020-2025 Subaru Legacy XT (2.4L FA24F H4 Turbo)

Fitment Notes

• Fits FA and FB engine families equipped with the small hub crankshaft - verify hub size before ordering; large hub applications require PSP-ENG-104 series
• Compatible with OEM and aftermarket accessory drive belts - no belt changes required
• No ECU tune or recalibration required for installation, though a tune can further optimize gains
• Designed to match the PERRIN Alternator Pulley for a coordinated engine bay appearance
• Backed by PERRIN's 5-year limited warranty for the original purchaser

Features

• Weighs just 1.2 lbs - 3.7 lbs lighter than the OEM crank pulley - equivalent to removing over 100 lbs of vehicle weight from a rotating mass standpoint
• Reduced rotational mass delivers measurable improvements in throttle response, horsepower, and torque
• CNC-machined from 6061-T6 billet aluminum for precision fitment and long-term strength
• Precision-machined belt grooves tightly sync with all OEM and aftermarket serpentine belts for extended belt life
• Anodized black finish with laser-etched detailing provides a clean, stealth engine bay appearance
• Includes O-rings for a sealed, rattle-free installation
• Direct OEM replacement - no modifications required
• Available in red and blue anodized finishes under the same PSP-ENG-106 part family

Specifications

• Part Number: PSP-ENG-106BK
• Color: Black (Anodized)
• Material: 6061-T6 Billet Aluminum
• Weight: 1.2 lbs (OEM: 4.9 lbs)
• Weight Savings: 3.7 lbs vs. OEM
• Hub Size: Small Hub
• Engine Compatibility: FA / FB Engine Families (Small Hub)
• Belt Compatibility: OEM and Aftermarket
• Warranty: 5 Years (original purchaser)

Included Components

• 1x PERRIN Lightweight Crank Pulley (Black)
• 1x Small Hub
• 2x O-Rings

Product Description

The PERRIN PSP-ENG-106BK is a lightweight crank pulley engineered for Subaru FA and FB small-hub engine applications, including the 2022-2025 WRX, BRZ, GR86, Crosstrek, Ascent, Outback XT, and Legacy XT. At just 1.2 lbs - 3.7 lbs lighter than the OEM unit - the reduction in rotating mass is significant enough to be felt immediately in throttle response, with PERRIN equating the effect to removing more than 100 lbs of static vehicle weight. Horsepower, torque, and engine rev speed all benefit from the lower inertia demand at the crankshaft.

CNC-machined from 6061-T6 billet aluminum with precision-cut belt grooves, this pulley maintains compatibility with all OEM and aftermarket serpentine belts without requiring belt replacement. The anodized black finish with laser-etched detailing integrates cleanly into the engine bay and coordinates with the PERRIN Alternator Pulley. Installation is a direct swap with no ECU recalibration required, and O-rings are included for a sealed fit. Backed by PERRIN's 5-year limited warranty.