Cusco 6A1 911 PS Billet Aluminum Engine Pitching Stopper for 2002-25 Subaru WRX

Vehicle Fitment

• 2002-2007 Subaru Impreza WRX (GDA, EJ205/EJ255 2.0L/2.5L Turbo H4, AWD)
• 2004-2007 Subaru Impreza WRX STI (GDB, EJ257 2.5L Turbo H4, AWD)
• 2008-2014 Subaru Impreza WRX (GRB/GVB, EJ255 2.5L Turbo H4, AWD)
• 2008-2014 Subaru Impreza WRX STI (GRB/GVF, EJ257 2.5L Turbo H4, AWD)
• 2015-2021 Subaru WRX (VA, FA20DIT 2.0L Turbo H4, AWD)
• 2015-2021 Subaru WRX STI (VAB, EJ257 2.5L Turbo H4, AWD)
• 2022-2025 Subaru WRX (VB, FA24DIT 2.4L Turbo H4, AWD)
• 1993-2001 Subaru Impreza WRX/STI (GC8, EJ20G/EJ20K/EJ207 2.0L Turbo H4, AWD)
• 1997-2008 Subaru Forester XT (SF5/SG5/SG9, EJ20T/EJ255 2.0L/2.5L Turbo H4, AWD)
• 2009-2018 Subaru Forester XT (SH5/SH9/SHJ/SJ5/SJG, EJ20T/EJ255/FA20DIT H4, AWD)
• 2019-2025 Subaru Forester (SK9, FB25 2.5L H4, AWD)
• 1993-2009 Subaru Legacy/Legacy B4/Legacy Wagon (BD5/BE5/BL5/BG5/BH5/BP5, EJ20/EJ20Y H4, AWD)
• 2008-2015 Subaru Exiga (YA4/YA5, EJ20 2.0L H4, AWD)
• 2014-2018 Subaru Levorg (VM4/VMG, FB16/FA20 1.6L/2.0L Turbo H4, AWD)
• 2013-2025 Subaru Crosstrek/XV (GP7/GT3/GT7, FB20/FB25 2.0L/2.5L H4, AWD)
• 2017-2025 Subaru Impreza G4/Sport (GK2/GK3/GK6/GK7/GT2/GT3/GT6/GT7, FB16/FB20 H4, AWD/FWD)

Fitment Notes

• Universal Subaru fitment across virtually all models with horizontally-opposed engines sharing the same pitching stopper mount location
• Not compatible with CVT-equipped models - manual transmission vehicles only
• Subaru XV/Crosstrek, Impreza G4, and Impreza Sport models require removal of the plastic pipe between the air cleaner and throttle body for installation
• Direct OEM replacement - uses the factory mounting location and bolt pattern
• Will increase NVH (vibration and noise) slightly at idle compared to the softer OEM rubber mount

Features

• Billet aluminum construction machined from a solid aluminum block for maximum strength and precision
• Heavy-duty hardened rubber bushings suppress engine and transmission pitching movement during acceleration and deceleration
• Improves throttle response and shift feel by reducing drivetrain movement under load
• Suppresses the fore-aft engine rocking that causes imprecise gear engagement and delayed power delivery
• Blue alumite (anodized) finish for corrosion resistance and a clean engine bay appearance
• Direct bolt-on replacement for the factory pitching stopper - no fabrication or modification required
• Replaces the OEM rubber-bushed unit that is prone to deterioration and eventual failure under increased power and torque
• Especially beneficial on modified vehicles with increased boost, power, and torque output
• Pre-assembled with bushings installed - ready for immediate bolt-on installation

Specifications

• Part Number: 6A1 911 PS
• Type: Reinforced Engine Pitching Stopper (Pitch Stop Mount)
• Position: Engine bay - between engine/transmission and chassis
• Main Body Material: Billet Aluminum
• Bushing Material: Heavy-Duty Hardened Rubber
• Finish: Blue Alumite (Anodized)
• Installation: Bolt-on OEM replacement
• Transmission Requirement: Manual transmission only (not CVT)
• UPC: 4996338026989

Included Components

• 1x Cusco Billet Aluminum Pitching Stopper Assembly (with HD rubber bushings pre-installed)
• 1x Mounting Hardware Kit

Product Description

The Cusco 6A1 911 PS Reinforced Engine Pitching Stopper is a billet aluminum pitch stop mount designed for virtually the entire range of Subaru horizontally-opposed engine vehicles equipped with manual transmissions. The pitching stopper is a critical drivetrain mount that controls the fore-aft rocking motion of the engine and transmission under acceleration and deceleration. The factory unit uses soft rubber bushings that are designed to minimize NVH at the expense of precision - and these bushings deteriorate over time, especially on modified vehicles with increased power and torque, leading to excessive engine movement, imprecise shift feel, and delayed throttle response.

This Cusco replacement is machined from a solid block of billet aluminum and fitted with heavy-duty hardened rubber bushings that are significantly stiffer than the OEM units while still providing acceptable NVH characteristics for daily driving. The result is a dramatic reduction in engine pitching movement under load, which translates directly to improved throttle response, crisper and more precise gear shifts, and better overall drivetrain composure during spirited driving. Users will notice a slight increase in vibration at idle compared to the factory mount, but most drivers find this tradeoff well worth the performance improvement.

The fitment list for this part is exceptionally broad, covering Subaru models from the GC8 Impreza WRX (1993) through the current VB-generation WRX (2022-2025), as well as Forester XT, Legacy GT, Levorg, Exiga, Crosstrek/XV, and Impreza G4/Sport models. All share the same engine pitching stopper mounting location as part of Subaru's horizontally-opposed engine architecture. Installation is a direct bolt-on replacement that takes approximately 30 minutes. On some newer models (XV, Impreza G4/Sport), removal of the plastic intake pipe between the air cleaner and throttle body is required for clearance. This part is not compatible with CVT-equipped models.