Skip to content
HARRYS EURO - NZ's Largest Online Performance Parts Store
HARRYS EURO – NZ's Largest Online Performance Parts Store

Density Line Upper Control Arm Kit, B9/B9.5 Audi A4/S4, A5/S5/RS5, Allroad

$1,483.99
This product is ready to order. Orders will have an estimated 2-week lead time.
Density Line

Product Description:

034Motorsport's Density Line Upper Control Arm Kits are available as Adjustable or Non-Adjustable Control Arms, and are designed to be performance replacements for all four of the factory front upper control arms. The result is tighter handling and more precise steering response than even brand new factory control arms can offer. In addition, adjustable upper control arms allow optimal alignment for your lowered or track driven vehicle.

The factory front control arms are an integral part of the suspension, but can start wearing out as early as 40,000 miles - especially on enthusiast-owned vehicles which are driven hard on the street or track. As the rubber bushings degrade and ball joints develop play, alignment is compromised and steering becomes less precise. This kit is a drop-in replacement with feature improvements over stock, that will tighten up front-end feel and allow camber adjustment to significantly improve handling.

Density Line Non-Adjustable Control Arms:

034Motorsport's complete Density Line Upper Control Arms are designed to be a performance replacement for all four factory front upper control arms. Featuring high-durometer rubber bushings and high-quality ball joints, Density Line Control Arms are engineered to limit unwanted deflection in the suspension, resulting in tighter handling and more precise steering response than even brand-new factory control arms can offer.

Density Line Adjustable Control Arms:

Featuring high-durometer rubber bushings, high-quality ball joints, machined-billet upper adjustable control arms, and Aurora or FK spherical bearings, this kit is engineered to limit unwanted deflection in the suspension. 034Motorsport's Density Line Adjustable Upper Control Arm Kit replaces the fixed factory front upper control arms to allow for precise, independent camber adjustments. Density Line Adjustable Upper Control Arms for the B9/B9.5 platform are available in two versions depending on your specific needs.

Benefits:

  • Complete, Drop-In Replacement for Factory Control Arms
  • Precisely Adjust Camber Independently at Each Front Wheel
  • Reduce Deflection to Maintain Suspension Geometry Under Load
  • Improve Handling Feel & Steering Precision

Features:

  • CNC-Machined Billet Aluminum Arms for Strength
  • High-Durometer Rubber Bushings (65 Durometer)
  • Genuine Aurora Spherical Rod Ends Featuring Self-Lubricating Teflon Race Lining
  • Anodized Finish for Durability
  • Rebuildable Design

What's Included:

  • Adjustable Front Upper Control Arms - Front (Left & Right)
  • Adjustable Front Upper Control Arms - Rear (Left & Right)
  • Rubber Dust Boots (Set of 4)
></center></div></div><div class=col2-set> <div class=col-1> <h3 style=Density Line Non-Adjustable:
  • Complete, Drop-In Replacement for Factory Upper Control Arms
  • Offers Improved Handling Feel & Steering Precision
  • High-Durometer Rubber Bushings (70 Durometer)
  • Includes New Hardware
  • Includes:
    • Front Upper Control Arms - Front (Left & Right)
    • Front Upper Control Arms - Rear (Left & Right)
    • Installation Hardware
Density Line Non-Adjustable

Camber Correcting:

  • Complete, Drop-In Replacement for Factory Control Arms
  • Offers Improved Handling Feel and Steering Precision
  • Camber Adjustability Tailored to How Your Car is Driven
  • Aurora or FK Spherical Bearings Featuring Self-Lubricating Teflon Race Lining
  • Add Positive Camber to Achieve Factory Alignment Specifications After Lowering and Reduce Tire Wear
  • +1.0 to +2.0 Degrees of Adjustment vs. Factory Arms (No Modification Required)
  • -0.2 to +2.0 Degrees of Adjustment vs. Factory Arms (With Minor Clearancing of Upright)
  • Black Anodized Finish
  • Includes:
    • CNC Machined Billet Upper Adjustable Control Arms - Front (Left & Right)
    • CNC Machined Billet Upper Adjustable Control Arms - Rear (Left & Right)
    • Rubber Spherical Bearing Dust Boots
Camber Correcting

Track Spec:

  • Complete, Drop-In Replacement for Factory Control Arms
  • Offers Improved Handling Feel and Steering Precision
  • Camber Adjustability Tailored to How Your Car is Driven
  • Gain Negative Camber for Increased Cornering Grip, Better Turn-In, and Improved Handling
  • -0.7 to +0.3 Degrees of Adjustment vs. Factory Arms (No Modification Required)
  • -1.9 to +0.3 Degrees of Adjustment vs. Factory Arms (With Minor Clearancing of Upright)
  • Clear Anodized Finish
  • High-Durometer Rubber Bushings (65 Durometer)
  • Aurora or FK Spherical Bearings Featuring Self-Lubricating Teflon Race Lining
  • Includes:
    • CNC Machined Billet Upper Adjustable Control Arms - Front (Left & Right)
    • CNC Machined Billet Upper Adjustable Control Arms - Rear (Left & Right)
    • Rubber Spherical Bearing Dust Boots
Track Spec

OE PART INTERCHANGE:

Upper Arms:

  • 8W0407505C
  • 8W0407506C
  • 8W0407509B
  • 8W0407510B

Installation & Warranty:

Installation:

  • It is imperative that the suspension be compressed to static ride height before any suspension pivot bushings are tightened, as per the factory installation procedure. If this is not done, the bushings will tear prematurely as the twisting forces on them will be much higher than is intended. 034Motorsport's Limited Warranty on Density Line products does not cover premature failure due to improper installation or use.
  • We highly recommend professional installation for this product.

Warranty:

  • 1 Year Limited Replacement Warranty (If you encounter any issues with our products outside of the warranty period, we will work with you to provide a resolution.)

Fitment

Make Model Years Chassis Engine
Audi A4 2017-Present B9/B9.5 2.0 TFSI
Audi A5 2017-Present B9/B9.5 2.0 TFSI
Audi allroad 2017-Present B9/B9.5 2.0 TFSI
Audi RS5 2018-Present B9/B9.5 2.9 TFSI
Audi S4 2018-Present B9 3.0 TFSI
Audi S5 2018-Present B9/B9.5 3.0 TFSI
034Motorsport Install Guide PDF

The assembly of your Density Line Adjustable Upper Control Arm Kit, B9 Audi A4/S4, A5/S5/RS5, Allroad is a relatively simple process. You can access our detailed assembly guide by clicking the link below.

 

Download Density Line Adjustable Upper Control Arm Kit, B9 Audi A4/S4, A5/S5/RS5, Allroad Assembly Guide

 

  • Unsure about fitment?
    Chat with our performance expert
  • NZ's largest Online performance parts store
  • All products backed by manufacturer warranty
  • 100% genuine parts
  • Hassle-free 30-day returns & refunds
  • Competitive pricing
    Seen a better price elsewhere? Let us check
  • Workshop installation available
  • Fast 1-3 days dispatch on in-stock items
  • Shipping from only $11.90
  • Click & collect available
  • Dealer-level MTA workshop
  • Expert tuning, upgrades, and servicing
  • Visit us: 15a parkway drive, Rosedale, Auckland
  • Open 6 days

Harrys Euro

150+ Brands · 30,000+ Performance Parts

Proudly Serving Kiwi Drivers for Over 9 Years
Store & Workshop
Workshop

Parts + services, under one roof

Shop performance parts in-store or online, then have them fitted and tuned by the same team. No referrals, no second trips.

Performance

Dealer-level workshop, MTA assured

Fully equipped to support late-model European vehicles — diagnostics, servicing, and performance builds done right.

Parts

Built for real-world performance

We fine-tune high-performance machines to suit how you actually drive.

Happy Customers

4.8
Based on 146 Google reviews
as of 01/05/2026
×

Follow Our Journey

Live build updates, event coverage, and behind-the-scenes — on Instagram.

Follow Us on Instagram ↗