SKU: 658 420 A | UPC: 4996338658289
Cusco Pillowball Rear GDA 2001-2007 Subaru Impreza (Will Not Fit OEM Big Spring Setup)
The Cusco Pillowball Rear GDA Mount (MPN 658 420 A) replaces factory rubber upper shock mounts with spherical pillow ball bearings on 2001-2007 Subaru Impreza GD/GG chassis models. This direct replacement delivers sharper rear suspension feedback and reduces bushing deflection for better cornering on street or track. Precision engineering ensures compatibility with aftermarket coilovers while maintaining OEM geometry.
Key Features
- Spherical Pillow Ball Bearing: Eliminates rubber compliance for direct shock movement and immediate road feedback during aggressive driving
- CNC Machined Aluminum Housing: Provides lightweight strength at 1.10 lbs to cut unsprung weight without sacrificing durability
- Direct Bolt-On Design: Matches OEM mounting points for simple installation on GD/GG chassis without fabrication
- Enhanced Alignment Control: Maintains rear camber and caster under load for consistent tire contact and grip
- Motorsport Tested Construction: Built with high-load bearings proven in rally and circuit applications for long-term reliability
Product Notes
- Will not fit OEM style big spring perch setup verify spring seat diameter before purchase
- Grease bearings periodically during service to extend lifespan
- Ships in protective Cusco box dimensions 5.9 x 5.9 x 3.9 inches
Installation Notes
- Professional installation recommended.
- Remove rear shocks and upper mounts access through trunk or rear seats
- Compatible with Cusco coilovers and most brands confirm perch size excludes OEM large helper springs
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2007 | Subaru | Impreza | WRX STI |
| 2007 | Subaru | Impreza | WRX STI Limited |
| 2006-2007 | Subaru | Impreza | WRX TR |
| 2006-2007 | Subaru | Impreza | 2.5i |
| 2001 | Subaru | Impreza | L |
| 2001-2004 | Subaru | Impreza | Outback |
| 2005-2007 | Subaru | Impreza | Outback Sport |
| 2001-2005 | Subaru | Impreza | RS |
| 2002-2004 | Subaru | Impreza | TS |
| 2002-2007 | Subaru | Impreza | WRX |
| 2006-2007 | Subaru | Impreza | WRX Limited |
Why Choose Cusco?
- 40 years of Japanese suspension manufacturing expertise
- Components trusted by World Rally Championship teams
- Every part precision-assembled for exact fit and function
Frequently Asked Questions
-
Q: Will this fit my 2004-2007 Subaru Impreza WRX STI GDA chassis?
A: Yes fits all listed 2001-2007 Impreza GD/GG models including WRX STI WRX RS but excludes OEM big spring perch setups -
Q: What materials are used in the mount?
A: Features a 50mm spherical pillow ball bearing in durable CNC aluminum housing with steel reinforcement for high-load performance -
Q: What is the warranty and install process?
A: Cusco provides 1-year manufacturer defect warranty bolt-on install takes 1-2 hours per side professional alignment advised after install
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Original Cusco box 5.9 x 5.9 x 3.9 inches
- Weight: 1.10 lbs
Alignment Components
Alignment components at Black Ops Auto Works include camber kits, caster kits, adjustable control arms, toe links, and shock mounts and camber plates built to correct suspension geometry and reduce uneven tire wear. Shop billet control arms, cam bolt kits, and adjustable arms from SPC Performance, AAD, Fox, and more. Black Ops Auto Works carries 1,367 alignment component SKUs across street, off-road, and towing platforms including Jeep, Dodge, GM trucks, Honda and Acura, and Toyota and Lexus. What This Collection Covers This collection combines five related alignment and suspension geometry categories: alignment kits, caster kits, control arms, camber kits, and shock mounts and camber plates. Product Types in This Collection Shoppers will find cam bolt and cam bracket kits for camber and caster correction, adjustable billet upper and lower control arms, rear toe links, and strut mounts. Camber and Caster Correction Camber kits and caster kits use cam bolts or adjustable bushing...
View Alignment Components Products
Cusco
Cusco parts and accessories for Japanese sport compact and all wheel drive platforms are stocked at Black Ops Auto Works. Shop coilovers, strut tower braces, chassis bracing, limited slip differentials, sway bars, bushings, control arms, and roll cage components for the Subaru WRX and STI, Toyota 86 and GR86, Mazda Miata, Honda Civic and S2000, Mitsubishi Evo, and Nissan Skyline and GT-R platforms. Every product is filterable by year, make, model, trim, and engine so the correct part ships the first time. Black Ops Auto Works carries 429 Cusco SKUs across suspension, chassis reinforcement, drivetrain, and interior categories. What This Brand Covers Cusco is a Japanese performance parts manufacturer with over 40 years of motorsports experience, engineering coilovers, chassis braces, differentials, and suspension components for Japanese domestic market race cars and street performance builds. The catalog is built around sport compact and all wheel drive platforms where precise cha...
View Cusco Products
Shock Mounts & Camber Plates
Shop shock mounts, strut mounts, camber plates, caster plates, pillowball upper mounts, motor mounts, and shock hardware from KYB, Tein, Cusco, Synergy Manufacturing, Ridetech, Progressive Suspension, Ground Control, Vorshlag, ISC Suspension, and other suspension mount manufacturers. Find OE-replacement strut mount kits, upgraded pillowball uppers for track and race use, adjustable camber and caster plates for lowered vehicles, heavy-duty off-road shock mounts, and application-specific mounting hardware for cars, trucks, SUVs, and off-road platforms. Shock and strut mounts wear out. Rubber isolators dry out, bearings fail, and the resulting clunks, vibrations, or alignment drift kill the ride quality even on a car with fresh dampers. This category covers everything from KYB direct-replacement strut mount kits for daily drivers to Cusco and Tein pillowball uppers for sport builds, plus dedicated camber and caster plates for lowered street, autocross, and track cars. Filter by moun...
View Shock Mounts & Camber Plates Products
Suspension
Suspension parts and complete kits for cars, trucks, SUVs, Jeeps, and off-road builds are stocked at Black Ops Auto Works. Shop coilovers, lowering springs, lift kits, leveling kits, shocks and struts, sway bars, control arms, tie rods, ball joints, bushings, chassis bracing, alignment hardware, air suspension, and complete stage kits from Bilstein, KW, Ohlins, Fox, KING, ICON, BC Racing, Silvers, Eibach, H&R, Swift Springs, Whiteline, Energy Suspension, Moog, SPC Performance, Rough Country, ReadyLIFT, BDS, Skyjacker, Air Lift, Firestone, and Black Ops Auto Works. Start with a matched shock and spring package or a full coilover kit, then layer in sway bars, chassis bracing, and camber adjustment hardware. Every part is filterable by year, make, model, trim, and drivetrain to confirm fitment before ordering. What This Category Covers Suspension is the highest-leverage handling upgrade on any vehicle. A properly matched shock, spring, and sway bar package produces measurable i...
View Suspension Products


