Riaction AUDI A4 / S4 (B9) 17+ 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
Unlock the full handling potential of your Audi A4 or S4 B9 with the Riaction Performance Shocks Coilover Kit, engineered for drivers who want to achieve a lower ride height, improved cornering, and a comfortable yet responsive street ride. This complete suspension upgrade offers the perfect balance between daily drivability and spirited performance.
Each kit includes 32 levels of damping adjustment and full-length ride height adjustability, giving you total control over how your Audi rides and responds. Built from high-quality materials and precision-machined components, Riaction coilovers deliver consistent performance and long-lasting durability.
Backed by a 2-year factory warranty, this coilover system is designed to meet the needs of both street enthusiasts and performance-focused Audi owners.
🔧 Coilover Features:
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Full-Length Ride Height Adjustment
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32 Damping Adjustment Levels
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Mono-Tube Damper Design
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Seamless 52mm Electroplated Carbon Steel Shock Body
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20mm Piston Rod (for McPherson Suspension)
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14mm Piston Rod (for Non-McPherson Suspension)
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CNC 6061 Aluminum 44mm High-Flow Piston
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Thinned CNC 6061 Floating Piston
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SAE9254 Cold-Wound Springs
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Polyurethane Oil Seals
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Multi-Thickness Valving Shims
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Low-Gas Pressure Design
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7.5w Compounded Suspension Fluid
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Fully Rebuildable Coilover Assembly
📧 International Orders: For global shipping inquiries, please email info@riactionshocks.com.
Refine your Audi B9’s stance and handling with Riaction coilovers—precision-tuned suspension engineered for real-world performance.
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.