Fits select 1993-2008 Subaru Impreza, WRX, STI, and Forester models.

The PERRIN Rear Differential Lockdown (PSP-DRV-534) is engineered to eliminate the excessive movement and "clunking" associated with the soft factory rear differential bushings. By securing the differential carrier more rigidly to the subframe, this kit significantly reduces drivetrain slop and prevents the differential from pitching under hard acceleration and gear changes. This modification results in a more direct transfer of power to the wheels and sharper, more predictable throttle response.

• Increases drivetrain rigidity for improved power delivery and feedback
• Reduces differential movement during aggressive shifts and high-torque launches
• Bolts directly to factory mounting points to reinforce the rear subframe connection
• High-strength construction designed for longevity and performance use
• Manufacturer Part Number: PSP-DRV-534

Fits select 2005-2026 Subaru WRX, STI, BRZ, GR86, and Outback XT models.

The PERRIN PSP-DRV-210 Driveshaft Carrier Bushings are designed to replace the soft, compliant factory rubber bushings that support the driveshaft's carrier bearing. By removing the excess play inherent in the OE mounts, these bushings stabilize the center of the drivetrain, ensuring more immediate power transfer to the wheels and reducing unwanted movement during aggressive shifts and hard acceleration.

Ideal for enthusiasts seeking a more connected feel, these bushings help eliminate the "mushy" throttle response and drivetrain clunks associated with high-torque loads. They install directly into the factory carrier bearing housing, providing a precision fit that sharpens vehicle dynamics without the excessive noise or vibration often found in solid mounts.

• Stabilizes the driveshaft by reducing carrier bearing deflection
• Improves throttle response and drivetrain rigidity
• Direct replacement for soft factory rubber bushings
• Essential for high-performance driving and track applications
• Manufacturer Part Number: PSP-DRV-210

Fits 2008-2026 Subaru WRX and 2008-2021 Subaru WRX STI.

The PERRIN Driveshaft Lockdown Kit is engineered to eliminate excessive movement at the center carrier bearing, a common source of drivetrain slop in Subaru platforms. By securing the driveshaft carrier bearing firmly in place, this kit maintains proper alignment under load and reduces the shifting or "thumping" felt during hard acceleration and gear changes.

• Eliminates carrier bearing movement to maintain drivetrain alignment
• Improves power delivery by reducing drivetrain slop
• Direct bolt-on solution for improved throttle response
• Durable construction designed for long-term performance
• Manufacturer Part Number: PSP-DRV-201

Fits 2022-2026 Subaru WRX, 2020-2025 Outback XT, 2014-2025 Forester XT, and 2013-2025 Crosstrek models equipped with a CVT.

The PERRIN Transmission Mount Support is engineered to reduce drivetrain slop by filling the large internal voids of the factory rubber transmission mount. By stiffening the mounting point, this insert improves power delivery and provides a more direct, connected feel during acceleration and gear transitions. It is a focused solution for owners looking to enhance throttle response without the excessive noise, vibration, and harshness (NVH) often associated with solid aftermarket mounts.

• Reduces transmission movement during aggressive driving and braking
• Enhances drivetrain rigidity for more consistent power delivery
• Designed specifically for Subaru CVT-equipped vehicles
• Fills OEM mount voids to eliminate unwanted drivetrain oscillation
• Easy installation into the factory housing
• Manufacturer Part Number: PSP-DRV-161

Fits 2013-2016 Scion FR-S Base models equipped with a manual transmission.

The PERRIN Transmission Support (PSP-DRV-160) is engineered to reduce the excessive drivetrain movement found in the factory setup. By reinforcing the OEM rubber transmission mount, this support brace minimizes deflection during hard acceleration, braking, and cornering. This leads to a more rigid connection between the engine and the chassis, resulting in improved shifter feel and more consistent gear engagement.

• Reduces transmission mount flex and drivetrain lash
• Enhances shift precision and driver feedback
• Direct bolt-on installation using factory mounting points
• Specifically designed for manual transmission models only
• Manufacturer Part Number: PSP-DRV-160

Fits select 1996-2007 Subaru WRX, STI, Forester, Legacy, and Outback models.

The PERRIN Transmission Crossmember Bushings are engineered to eliminate the excessive movement inherent in the soft factory rubber bushings. By stiffening the mounting point between the transmission crossmember and the chassis, these bushings provide a more direct connection to the drivetrain, resulting in improved shifting precision and reduced drivetrain slop during hard acceleration and gear changes.

Constructed from high-durometer polyurethane, these bushings offer a significant upgrade over OE components without the harshness of a solid metal mount. They are a must-have for drivers looking to sharpen the tactile feedback and responsiveness of their Subaru drivetrain.

• Manufacturer Part Number: PSP-DRV-140
• Material: High-durometer polyurethane
• Reduces transmission movement under load
• Improves gear engagement feel and throttle response
• Replaces soft factory rubber bushings

Fits 2015-2020 Subaru WRX STI (Base, Launch Edition, Limited, and Series.HyperBlue).

The PERRIN Pitch Stop Mount and Firewall Brace kit addresses two critical weak points in the VA chassis drivetrain and structural assembly. This kit replaces the soft, factory pitch stop mount with a more rigid unit to significantly reduce engine and transmission movement during aggressive acceleration and gear transitions. By controlling this movement, more power is effectively transferred to the wheels while improving shift feel.

The included firewall brace provides essential reinforcement for the thin factory metal. By distributing the load across the pitch stop mounting point, it prevents the firewall from flexing or cracking—a known issue under heavy use. Finished in a durable black coating, this bolt-on upgrade provides both structural security and a clean engine bay aesthetic.

• Reduces engine and transmission pitching to improve throttle response and power delivery
• Reinforces the firewall to prevent structural fatigue and clutch pedal flex
• Direct replacement for factory components with precise fitment
• Corrosion-resistant black finish
• Manufacturer Part Number: PSP-DRV-112BK

Fits all 1998-2008 Subaru Forester models.

The PERRIN Pitch Stop Mount (PSP-DRV-102BK) is engineered to significantly reduce the fore-and-aft pitching of the engine and transmission during heavy acceleration, braking, and gear changes. By replacing the compliant factory unit with this reinforced black mount, you gain better throttle response and a more positive, connected shifting feel through the drivetrain.

• Minimizes engine and transmission movement for improved power transfer
• Reinforced design provides superior stability over factory rubber mounts
• Durable black finish for long-lasting corrosion resistance
• Direct bolt-on installation utilizing existing mounting points
• Manufacturer Part Number: PSP-DRV-102BK

Fits select 1993-2026 Subaru Impreza, WRX, STI, Crosstrek and 2009-2025 Forester and Legacy models.

The PERRIN Pitch Stop Mount (PSP-DRV-101SL) is engineered to control the pitching motion of the engine and transmission during aggressive acceleration and heavy braking. The factory mount uses soft rubber bushings that allow the drivetrain to deflect, leading to sloppy shift feel and unnecessary movement. This PERRIN upgrade replaces the OEM unit with a rigid, CNC-machined component that stabilizes the drivetrain for better power transfer and a more connected driving experience.

• CNC-machined from 6061-T6 billet aluminum for maximum rigidity
• Durable silver anodized finish for corrosion resistance
• Equipped with high-durometer polyurethane bushings to minimize engine deflection
• Reduces drivetrain "clunk" and improves shifting precision
• Direct bolt-on replacement for factory mounting points
• Manufacturer Part Number: PSP-DRV-101SL

Fits 2015-2020 Subaru WRX (Base, Limited, and Premium).

The PERRIN Pitch Stop Mount (PSP-DRV-101RD) is engineered to control the fore and aft "pitching" of the drivetrain, a common point of weakness in the 2015-2020 Subaru WRX during aggressive driving. By replacing the compliant factory-installed mount with this rigid performance upgrade, you effectively stabilize the engine and transmission. This results in more precise gear engagement, reduced drivetrain lash, and a significantly more responsive throttle feel under both acceleration and braking.

• Manufacturer Part Number: PSP-DRV-101RD
• Color: Red Anodized Finish
• Direct replacement for the soft factory pitch stop mount
• Reduces engine and transmission movement under load
• Improves shifting precision and drivetrain rigidity

Fits select 1993-2026 Subaru WRX, STI, Impreza, and Crosstrek, and 2009-2025 Forester and Legacy models.

The PERRIN Pitch Stop Mount (PSP-DRV-101NY) is engineered to control the fore-and-aft pitching of the engine and transmission during heavy acceleration and braking. By replacing the soft factory mount, this component significantly reduces drivetrain slop, resulting in more precise gear changes and improved throttle response for a more connected driving experience.

• Reduces engine and transmission pitch under load for improved drivetrain rigidity
• Enhances shifting feel and throttle response by eliminating factory mount flex
• High-visibility yellow finish adds a custom aesthetic to the engine bay
• Direct replacement for the factory plastic or rubber pitch stop unit
• Manufacturer Part Number: PSP-DRV-101NY

The PERRIN Pitch Stop Mount (PSP-DRV-101HP) is engineered to control the fore and aft movement of the drivetrain during aggressive shifting and heavy acceleration. By replacing the flexible factory unit, this mount significantly reduces the "pitching" motion of the engine and transmission, ensuring more power reaches the ground and improving overall throttle response.

Fits select 1993-2026 Subaru WRX, STI, Impreza, and Crosstrek, as well as 2009-2025 Forester and Legacy models.

• Reduces drivetrain pitch to enhance shift precision and feel.
• Replaces the soft OEM plastic or rubber mount for a more rigid, connected drivetrain.
• Durable construction designed to withstand the stresses of performance driving.
• Vibrant Pink finish adds a customized aesthetic to your Subaru's engine bay.
• Direct bolt-on replacement for the factory mounting points.
• Manufacturer Part Number: PSP-DRV-101HP

Fits select 1993-2026 Subaru WRX, STI, Impreza, and Crosstrek, and 2009-2025 Forester and Legacy models.

The PERRIN Pitch Stop Mount (PSP-DRV-101BL) is engineered to control the pitching movement of the engine and transmission during heavy acceleration, braking, and gear changes. By replacing the compliant factory rubber mount with this rigid blue-anodized upgrade, you eliminate drivetrain slop and gain a more direct connection between the powertrain and the chassis.

Ideal for both performance-oriented daily drivers and track-focused builds, this mount sharpens throttle response and improves shifter precision by keeping the drivetrain properly aligned under load. It installs as a direct bolt-on replacement for the OEM unit, utilizing factory mounting points on the firewall and engine/transmission.

• Manufacturer Part Number: PSP-DRV-101BL
• Finish: Blue Anodized
• Material: High-strength construction with performance bushings
• Application: Reduces drivetrain pitching for better power transfer
• Installation: Direct bolt-on replacement

Fits 2015-2020 Subaru WRX STI (Base, Launch Edition, Limited, and Series.HyperBlue).

The PERRIN Pitch Stop Mount is engineered to control the fore-and-aft movement of the engine and transmission during aggressive acceleration and gear changes. By replacing the compliant factory mount, this upgrade significantly reduces drivetrain slop, resulting in improved throttle response and a more connected driving experience. This durable black mount is a direct replacement for the OEM unit, ensuring a straightforward installation and long-lasting performance.

• Reduces engine and transmission pitch under load
• Improves throttle response and shifting precision
• Designed as a direct replacement for the factory mounting point
• Finished in durable black for a clean engine bay appearance
• Manufacturer Part Number: PSP-DRV-101BK

Fits select 2022-2026 Subaru WRX, BRZ, Outback, Legacy, Forester, and Toyota GR86 models.

The PERRIN Engine Mount Kit (PSP-DRV-056) is designed to significantly reduce engine movement compared to soft factory rubber mounts. By securing the engine more firmly within the chassis, this kit improves throttle response, provides more precise shifting, and helps transfer power to the ground more efficiently. This is an essential upgrade for drivers looking to eliminate drivetrain slop and improve the mechanical connection between the driver and the vehicle.

• Reduces engine pitch and drivetrain movement for improved power delivery
• Enhances throttle response and shifting precision
• High-durability construction designed to replace wear-prone OE bushings
• Direct bolt-on installation for supported chassis
• Manufacturer Part Number: PSP-DRV-056

Fits select 1993-2021 Subaru WRX, Impreza, and STI, 2013-2020 BRZ, FR-S, and 86, and 2005-2009 Legacy GT and Outback XT.

The PERRIN Motor Mount Kit (PSP-DRV-055) is engineered to significantly reduce engine movement compared to the soft, fluid-filled or rubber factory mounts. By securing the engine more firmly to the chassis, these mounts eliminate drivetrain slop, improve throttle response, and provide more precise shifting under heavy load. This kit is an essential upgrade for high-horsepower builds and track-driven vehicles where maintaining proper drivetrain alignment is critical.

• Direct replacement for OEM engine mounts to reduce pitch and sway
• High-durometer polyurethane bushings for long-lasting performance
• Reduces energy loss through the drivetrain for better power delivery
• Includes all necessary mounting hardware
• Manufacturer Part Number: PSP-DRV-055

Fits 2013-2026 Subaru BRZ, Scion FR-S, and Toyota 86 / GR86 models.

Improve your braking confidence and pedal response with the PERRIN Master Cylinder Brace. Under heavy braking loads, the thin firewall of the chassis can flex, leading to a soft or spongy brake pedal feel. This brace creates a bridge between the master cylinder and the strut tower, providing a rigid mechanical stop that eliminates firewall deflection.

• Reduces firewall flex during threshold braking for a firmer, more consistent pedal feel
• Enhances brake modulation and driver feedback during spirited driving or track use
• Direct bolt-on installation using existing factory mounting points
• Durable construction with a sleek black finish for a stealth engine bay appearance
• Manufacturer Part Number: PSP-BRK-406BK

Fits 2015-2021 Subaru WRX/STI, 2013-2017 Crosstrek, and 2014-2018 Forester XT.

The PERRIN Master Cylinder Brace (PSP-BRK-403NY) is designed to solve the common issue of firewall flex during heavy braking. In many modern Subarus, the thin sheet metal of the firewall bows under pressure, leading to a soft or "mushy" brake pedal feel. By creating a rigid bridge between the master cylinder and the strut tower, this brace prevents deflection, ensuring that all pedal force is converted directly into hydraulic pressure for improved braking response and modulation.

• Eliminates firewall flex to provide a firm, consistent brake pedal feel
• High-visibility Neon Yellow powder-coated finish for durability and style
• Rigid construction engineered to withstand high pedal loads
• Direct bolt-on installation using existing factory mounting points
• Manufacturer Part Number: PSP-BRK-403NY

Fits 2015-2020 Subaru WRX STI models including Base, Limited, Launch Edition, and Series.HyperBlue.

Eliminate brake pedal flex and restore confidence in your braking system with the PERRIN Master Cylinder Brace. On the VA chassis Subaru WRX STI, the firewall is prone to flexing under heavy pedal pressure, resulting in a spongy or mushy feel. This brace provides a rigid bridge between the master cylinder and the shock tower, effectively neutralizing that flex for a firmer, more consistent pedal response.

• Eliminates master cylinder movement and firewall flex during hard braking
• Improves brake pedal feel and overall modulation
• Durable black finish for long-lasting corrosion resistance and a clean engine bay aesthetic
• Engineered to bolt directly to factory mounting points
• Manufacturer Part Number: PSP-BRK-403BK

Fits 2008-2014 Subaru Impreza WRX, including WRX Limited and WRX Premium models.

The PERRIN Master Cylinder Bracket (PSP-BRK-402RD) addresses a known chassis weak point: firewall flex. During heavy braking, the thin firewall of the 2008-2014 WRX can deflect, allowing the master cylinder to shift forward and resulting in a soft or "mushy" pedal feel. This bracket bridges the gap between the master cylinder and the shock tower, creating a rigid mechanical stop.

Installing this brace eliminates that movement, providing a stiffer, more consistent brake pedal and significantly improved tactile response during spirited driving or track sessions. The durable red finish provides corrosion resistance and a performance look for your engine bay.

• Reduces firewall deflection and master cylinder movement under load
• Improves brake pedal stiffness and driver feedback
• Bolts directly to factory mounting points for secure installation
• Finish: Durable Red Coating
• Manufacturer Part Number: PSP-BRK-402RD

Fits 2008-2014 Subaru Impreza WRX (including Limited and Premium models).

Improve your braking response and pedal feel with the PERRIN Master Cylinder Bracket. On many Subaru chassis, the thin firewall flexes significantly during heavy braking, which manifests as a "mushy" or inconsistent pedal. This bracket solves the issue by creating a solid bridge between the master cylinder and the driver-side shock tower, effectively bracing the cylinder and eliminating deflection under load.

• Functional Performance: Eliminates firewall flex for a firmer, more predictable brake pedal modulation.
• Durable Construction: High-strength design finished in a sleek black coating for corrosion resistance and a clean engine bay look.
• Direct Installation: Bolts to existing factory mounting points on the shock tower for a secure fit.
• Manufacturer Part Number: PSP-BRK-402BK

Fits select 2008-2014 Subaru Impreza WRX STI models.

Improve braking response and pedal consistency with the PERRIN Master Cylinder Bracket. On the Subaru GR/GV chassis, the firewall is prone to flexing under heavy braking loads, which creates a soft, spongy pedal feel. This bracket bolts directly to the driver-side shock tower and acts as a brace against the master cylinder, eliminating that movement and ensuring your mechanical force is directed entirely into the hydraulic system.

• Red powder-coated finish for corrosion resistance and engine bay aesthetics
• Constructed from heavy-duty 6061-T6 aluminum and steel for zero-flex performance
• Reduces master cylinder deflection for a firmer, more communicative brake pedal
• Includes all necessary mounting hardware for a direct-bolt installation
• Manufacturer Part Number: PSP-BRK-401RD

Vehicle Fitment:

• 2008-2014 Subaru Impreza WRX STI
• 2011-2014 Subaru Impreza WRX STI Limited
• 2010 Subaru Impreza WRX STI Special Edition

Fits 2008-2014 Subaru Impreza WRX STI models (including Limited and Special Edition).

The PERRIN Master Cylinder Bracket (PSP-BRK-401BK) addresses a common weak point in the Subaru braking system: firewall flex. Under heavy braking, the thin firewall of the WRX STI can physically bow, causing the master cylinder to move and resulting in a soft, inconsistent pedal feel. This bracket bolts directly to the chassis to provide a rigid brace for the master cylinder, ensuring that every pound of foot pressure is translated directly into stopping power.

• Improved Pedal Feel: Eliminates firewall movement for a firm, communicative brake pedal response.
• Robust Construction: Engineered for maximum rigidity to withstand high braking pressures.
• Black Finish: Features a durable black coating for a clean, professional appearance under the hood.
• Direct Bolt-On: Uses factory mounting points for a secure installation without permanent vehicle modification.
• Manufacturer Part Number: PSP-BRK-401BK

Fits 2002-2007 Subaru Impreza (including WRX, STI, 2.5i, RS, TS, and Outback Sport).

The PERRIN Master Cylinder Support Bracket (PSP-BRK-400) addresses a common weakness in the GD chassis braking system: firewall flex. Under heavy braking, the pressure applied to the pedal actually deflects the thin sheet metal of the firewall, causing a spongy, inconsistent pedal feel. This bracket bridges the gap between the brake master cylinder and the driver-side shock tower, creating a rigid mechanical brace that eliminates movement.

• Prevents master cylinder movement by bracing it against the shock tower
• Delivers a firmer, more responsive brake pedal with improved modulation
• Heavy-duty steel construction ensures zero-flex performance
• Finished in a durable black powder coat for long-term corrosion resistance
• Bolts directly to factory mounting points with included hardware
• Manufacturer Part Number: PSP-BRK-400

Fits select 2013-2026 Subaru WRX, STI, and BRZ, Toyota GR86 and 86, and Scion FR-S.

The PERRIN Stainless Steel Clutch Line is engineered to replace the factory rubber hose, providing a firmer and more consistent pedal feel during performance driving. Under high hydraulic pressure or extreme engine bay temperatures, original equipment rubber lines can expand or swell, resulting in a spongy pedal and vague engagement points. This PERRIN upgrade eliminates line expansion, ensuring direct hydraulic transfer from the master cylinder to the slave cylinder for precise clutch modulation.

• Constructed with high-pressure braided stainless steel for maximum expansion resistance
• PTFE inner liner ensures compatibility with all DOT 3 and DOT 4 brake fluids
• Provides more consistent engagement points under heavy use or heat soak
• Direct-fit replacement for the factory clutch hose
• Corrosion-resistant fittings for long-term durability
• Manufacturer Part Number: PSP-BRK-305

Fits select 2005-2021 Subaru STI, 2006-2026 WRX, and 2005-2009 Legacy GT and Outback XT models.

The PERRIN Clutch Delay Valve Delete (PSP-BRK-300RD) is designed to restore a linear and predictable feel to your Subaru's clutch pedal. Factory clutch systems often include a delay valve or orifice designed to slow down the engagement speed to protect drivetrain components, which can result in a vague, inconsistent pedal feel during performance driving. This PERRIN upgrade removes that restriction, allowing for more precise modulation and faster, more direct engagement.

• Eliminates factory clutch engagement delay for a more connected driving experience
• Improves clutch pedal feedback and consistency during spirited shifting
• CNC machined construction with a durable red finish for long-lasting performance
• Direct replacement for the OEM component
• Manufacturer Part Number: PSP-BRK-300RD

Fits select 2005-2026 Subaru WRX, STI, Legacy GT, and Outback XT.

The PERRIN Clutch Delay Valve Delete is a performance-oriented upgrade designed to provide a more direct and predictable clutch feel. Factory Subaru clutch systems often utilize a delay valve that restricts fluid flow, slowing down engagement regardless of pedal release speed. While intended to dampen drivetrain shock, this often results in a vague pedal feel and inconsistent engagement during spirited driving.

By removing this restriction, the PERRIN delete allows for immediate hydraulic response, giving the driver better control over the bite point. This is an essential modification for enthusiasts looking to eliminate the "spongy" sensation and improve the timing of aggressive shifts.

• Improved Engagement: Removes fluid flow restrictions for faster, more consistent clutch response.
• Direct Feedback: Eliminates the vague pedal feel caused by the OEM delay mechanism.
• Clean Aesthetics: Features a durable black finish to integrate seamlessly with your vehicle's engine bay.
• Exact Replacement: Specifically designed to replace the factory delay valve fitting.
• Manufacturer Part Number: PSP-BRK-300BK

Fits 2015-2026 Subaru WRX and 2015-2021 Subaru STI.

Eliminate trunk rattle and achieve perfect panel alignment with the PERRIN Adjustable Trunk Bumper Set. These components replace the soft, non-adjustable factory rubber stops that compress over time, which often results in vibrations and uneven body gaps. By providing a solid, adjustable contact point, these bumpers allow you to dial in the exact tension required for a secure and quiet trunk closure.

• Manufacturer Part Number: PSP-BDY-502RD
• Includes a set of two (2) adjustable trunk bumpers
• Fully adjustable height to correct trunk alignment and eliminate play
• Durable construction with a vibrant red finish for a custom engine bay or trunk look
• Direct replacement for factory rubber bumpers

Fits 2015-2026 Subaru WRX and 2015-2021 Subaru WRX STI.

Correct your trunk alignment and eliminate annoying rattles with the PERRIN Adjustable Trunk Bumper Set. Factory trunk bumpers are often non-adjustable, leading to uneven gaps between the trunk lid and rear quarter panels. These precision-engineered replacements feature a threaded design that allows you to fine-tune the height of your trunk lid for a perfect, flush fitment.

• Provides precise trunk lid height adjustment to align body lines
• Helps eliminate vibrations and rattles caused by loose-fitting trunk lids
• Direct replacement for factory rubber trunk stops
• Blue finish adds a custom aesthetic to your trunk jamb
• Includes two (2) adjustable bumpers
• Manufacturer Part Number: PSP-BDY-502BL

Fits 2015-2020 Subaru WRX (Base, Limited, and Premium) Sedans equipped with the factory Premium spoiler.

The PERRIN Gurney Flap (PSP-BDY-402BK) is a precision-engineered aerodynamic component designed to increase rear downforce and stability on your WRX. This flap installs directly onto the trailing edge of the factory low-profile "Premium" wing, extending its surface area to improve airflow separation and create a more aggressive rear profile without requiring a full wing replacement.

• Specifically designed for the 2015-2020 Subaru WRX sedan factory Premium wing
• Increases rear-end downforce and high-speed stability
• Low-profile design for a clean, functional aesthetic
• Durable construction with a sleek black finish
• Manufacturer Part Number: PSP-BDY-402BK