Tein Street Basis Z Coilovers Subaru Forester 2003-2008 | GSS50-81SS2

Product Fitment: 

2003-2008 Subaru Forester

Transform the handling and stance of your 2003–2008 Subaru Forester SG6 with the TEIN Street Basis Z Coilovers. Designed as a ride height–adjustable suspension system, this kit is perfect for daily drivers who want sharper handling, improved stability, and a lower, more aggressive look—without sacrificing everyday comfort.

Unlike mixing lowering springs with separate performance shocks, the Street Basis Z kit is engineered as a matched system. TEIN selects the ideal spring rates and damper valving, eliminating guesswork and ensuring a balanced, predictable ride. With full ride-height adjustability, you can fine-tune each corner for personal preference or correct left-to-right factory height differences.

Built on TEIN’s extensive motorsport heritage, these entry-level coilovers deliver performance and reliability at an accessible price. The shortened shell case design maximizes damper stroke even at lower ride heights, allowing your Forester to stay comfortable while achieving an aggressive stance. Height adjustments are made easy with TEIN’s ZT-coated threaded sleeve, ensuring smooth, corrosion-resistant operation.

Key Features

• Height-adjustable coilover system for Subaru Forester SG6

• Optimized spring rates and damper valving—no mixing brands or guessing

• Designed for daily comfort with improved handling and responsiveness

• Shortened shell case for better ride quality at low ride heights

• ZT-coated threaded sleeve for smooth adjustment and corrosion resistance

• Durable steel construction with powder-coated damper bodies

• Twin-tube internal design for comfort and stability

• No-sag springs with long-term reliability

• Includes full-length dust boots (some models reuse OEM boots)

• 1-year manufacturer’s limited warranty

What’s Included

• 4 TEIN Street Basis Z coilover shocks

• 4 no-sag performance springs

• 4 bump stops

• 2 hook spanners

• Spring seats, locks, dust covers (varies by vehicle), and thrust washers

• TEIN sticker sheet

• Full installation instructions

Specifications

• Part Number: GSS50-81SS2

• Vehicle Fitment: 2003–2008 Subaru Forester 2.5L AWD (SG6)

• Spring Rates (Front/Rear): 4 kg/mm (223.99 lbs/in)

• Ride Height Adjustment Range:

  • Front: -1.9 in to -3.7 in

  • Rear: -1.6 in to -3.7 in

• Damping Adjustment: None

• Ride Height Adjustable: Front & Rear

• Upper Mounts: OEM

• EDFC Compatible: No

Upgrade your SG6 Forester with a suspension system that offers improved performance, adjustability, and everyday drivability—all backed by TEIN’s racing expertise.