Riaction 07-14 Subaru Impreza STI GRB / GRF Traction Plus Ultra Coilovers
SHIPPING - RETURNS - WARRANTY - CANCELLATION POLICY
*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
Upgrade the composure and grip of your 07-14 Subaru Impreza STI GRB/GRF with Riaction Traction Plus Ultra coilovers. Engineered for high-load AWD performance driving, the TPU system improves corner entry stability, reduces chassis roll under boost, and delivers more consistent traction during aggressive acceleration.
Traction Plus Ultra features our new digressive piston design, built to provide strong low-speed damping for enhanced body control and sharper steering response while remaining composed as suspension velocity increases. On the VA platform, this translates into improved transitional stability and greater confidence when pushing through high-speed corners or uneven pavement.
Each system is constructed with a nickel-coated shock body to protect against corrosion and environmental exposure. The hex screw preload collar locking system ensures spring preload remains secure under repeated track use and spirited driving. Signature orange-coated non-MacPherson components add durability and a distinctive finish, while pillowball upper mounts are included where applicable to increase steering precision and suspension articulation.
Every Traction Plus Ultra kit is backed by our 2-year factory warranty.
🔧 Traction Plus Ultra Coilover Features:
Full-Length Ride Height Adjustment
32-Level Damping Adjustment
New Digressive Piston Valving
Mono-Tube Damper Design
Nickel-Coated Shock Body for Corrosion Protection
Hex Screw Preload Collar Locking System
Signature Orange Coating on Non-MacPherson Components
Pillowball Upper Mounts (When Applicable)
44mm High-Flow CNC 6061 Aluminum Piston
CNC 6061 Aluminum Floating Piston
Polyurethane Oil Seals
SAE9254 Cold-Wound Performance Springs
Multi-Thickness Valving Shims
Low-Gas Pressure Internal Design
7.5w Compounded Suspension Fluid
Fully Rebuildable Coilover Assembly
⚙️ Factory Spring Rates:
Front: 8K
Rear: 8K
📧 International Orders:
For international shipping inquiries, please email us at info@riactionshocks.com
Maximize grip and high-speed stability in your 07-14 Subaru Impreza STI GRB/GRF with Traction Plus Ultra coilovers, advanced performance shocks engineered by Riaction Performance Shocks.
Our History
For 26 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.