PERRIN PSP-INR-220 Short Shifter Adapter for 2004-2021 Subaru WRX STI

Vehicle Fitment

• 2004-2007 Subaru Impreza WRX STI (2.5L Turbo H4, 6-Speed Manual, AWD)
• 2008-2014 Subaru WRX STI (2.5L Turbo H4, 6-Speed Manual, AWD, GR/GV Platform)
• 2015-2021 Subaru WRX STI (2.5L Turbo H4, 6-Speed Manual, AWD, VA Platform)

Fitment Notes

• Fits Subaru STI models equipped with the factory 6-speed manual transmission only.
• Does not fit Subaru WRX models with the 5-speed or 6-speed WRX manual transmission.
• Not compatible with automatic or CVT transmissions.
• Retains the factory shift lever while reducing shift throw.

Features

• Reduces shifter throw by up to 50% for quicker gear changes.
• CNC-machined aluminum short shifter adapter for maximum strength.
• Includes polyurethane shifter bushings for improved shift feel.
• Maintains factory shift knob height and ergonomics.
• Provides more precise and positive gear engagement.
• Direct bolt-on installation with no cutting or welding required.
• Designed specifically for the Subaru STI 6-speed manual transmission.
• Engineered and manufactured by PERRIN Performance.

Specifications

• Part Number: PSP-INR-220
• Brand: PERRIN Performance
• Product Type: Short Shifter Adapter
• Adapter Material: CNC-Machined Aluminum
• Bushing Material: Polyurethane
• Transmission Compatibility: OEM 6-Speed Manual
• Shift Throw Reduction: Up to 50%
• Installation: Direct Bolt-On

Included Components

• 1x PERRIN Short Shifter Adapter
• 2x Polyurethane Shifter Bushings
• 3x 10-32 Socket Set Screws
• 1x Polyurethane Grease Packet
• 1x Hex Key
• 1x Installation Hardware Kit
• 1x Installation Instructions

Product Description

The PERRIN PSP-INR-220 Short Shifter Adapter is designed to improve the driving experience of 2004-2021 Subaru WRX STI models equipped with the factory 6-speed manual transmission. Instead of replacing the entire shift lever, this precision CNC-machined aluminum adapter modifies the factory linkage geometry to reduce shift throw by up to 50%, resulting in faster, shorter, and more precise gear changes while maintaining the original shift knob height.

The kit also includes high-quality polyurethane shifter bushings that minimize shifter deflection and eliminate excess play for a firmer, more positive shifting feel. Engineered as a direct bolt-on upgrade, the adapter installs using the supplied hardware without permanent modifications, making it an excellent performance enhancement for both daily-driven and track-focused Subaru STI vehicles.