Restore factory handling while elevating steering precision and driver confidence with the 034Motorsport Density Line Control Arm Kit for Audi C8 models. Designed as a comprehensive solution for worn or aging suspension components, this kit replaces the factory upper and lower control arms, front sway bar end links, and ball joints with performance-engineered Density Line components that deliver sharper response and improved chassis stability without sacrificing comfort.

Factory C8 suspension bushings are designed with comfort as the primary objective, utilizing soft rubber compounds and fluid-filled lower control arm bushings that deteriorate over time and can leak under repeated load and heat cycles. 034Motorsport Density Line Control Arms eliminate these compromises with higher-durometer rubber bushings that provide more precise suspension articulation and improved steering feel while maintaining excellent street manners for daily-driven luxury and performance applications alike.

Whether you drive an Audi A6, Allroad, A7, S6, S7, RS6, or RS7, this complete front suspension refresh kit is engineered to restore tight, predictable handling and reduce unwanted front-end movement during spirited driving, highway cruising, or aggressive cornering.

The included Density Line Lower Control Arms feature durable 65-durometer rubber bushings and new ball joints to improve front-end stability and steering accuracy while eliminating the failure-prone fluid-filled factory bushings. Density Line Upper Control Arms utilize stiffer 70-durometer rubber bushings to further sharpen steering response and suspension consistency under load. Complementing the system are Density Line Front Sway Bar End Links, which reduce flex and improve sway bar effectiveness for more direct turn-in and improved handling feel.

Each component is engineered as a direct, drop-in replacement and includes the necessary installation hardware for straightforward installation and long-term reliability.

Lower Control Arm Features:

• Complete, Drop-In Replacement for Factory Lower Control Arms
• Offers Improved Handling Feel & Steering Precision
• High-Durometer Rubber Bushings (65 Durometer)
• No Fluid, So Unlike OE Arms, the Bushings Cannot Leak
• Includes New Ball Joints

Upper Control Arm Features:

• Complete, Drop-In Replacement for Factory Upper Control Arms
• Offers Improved Handling Feel & Steering Precision
• High-Durometer Rubber Bushings (70 Durometer)
• Includes New Hardware

Density Line Sway Bar End Link Features:

• Complete, Drop-In Replacement for Factory Sway Bar End Links
• Offers Improved Handling Feel & Steering Precision
• High-Durometer Rubber Bushings
• Includes New Hardware

Part Number Interchange:

• 4K0 407 151 C, Control Arm, Lower Front Left
• 4K0 407 152 C, Control Arm, Lower Front Right
• 80A 407 693 E, Control Arm, Lower Rear Left
• 80A 407 694 E, Control Arm, Lower Rear Right
• 4M0 407 505 B, Upper Front Left
• 4M0 407 506 B, Upper Front Right
• 4M0 407 509 B, Upper Rear Left
• 4M0 407 510 B, Upper Rear Right
• 80A 407 689 C, Ball Joint
• 4M0 411 317 J, End Link
• 4M0 411 317, End Link
• 4M0 411 317 L, End Link (Supersession)

What’s Included:

• Front Lower Control Arms – Front (Left & Right)
• Front Lower Control Arms – Rear (Left & Right)
• Ball Joints (Pair)
• Front Upper Control Arms – Front (Left & Right)
• Front Upper Control Arms – Rear (Left & Right)
• 2x Density End Links
• New Installation Hardware