TGK Motorsport Audi Thrust Arm Spherical Monoball Kit - B9 A4/S4/RS4/A5/S5/RS5
TGK Motorsport Audi Thrust Arm Spherical Monoball Kit - B9 A4/S4/RS4/A5/S5/RS5
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$449.99
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Overview
⚠ Spherical Suspension Parts ⚠
Vehicles equipped with spherical bearings, heims, uniballs, solid bushings, or other performance suspension components may experience increased noise, vibration, and harshness (NVH) compared to factory OEM components. Occasional squeaking, creaking, clicking, or other operational noises are considered normal characteristics of these performance-oriented parts and do not necessarily indicate a defect or failure.
Noise levels can vary based on installation, driving conditions, weather, maintenance, and normal wear. Regular inspection and maintenance are recommended to ensure proper performance and longevity. By purchasing and/or installing these components, the customer acknowledges and accepts these characteristics as part of a high-performance suspension system.
Due to the Nature of Spherical Suspension Parts, there is a One Year Limited Warranty from Purchase Date.
Audi's front thrust arm bushings are a known weak spot, often prone to premature failure. The factory rubber bushings are designed to allow a fair amount of forward and backward wheel movement to absorb road impacts, providing a smooth and comfortable ride. While this helps deliver the luxurious feel Audi is known for, it also contributes to a disconnected, vague steering feel that many enthusiasts find lacking. Beyond comfort, the constant flexing of the rubber bushings also leads to issues over time—such as reduced handling, steering delays, wheel shimmy, braking delays, unwanted alignment shifts, and uneven tire wear. Aside from the fact they are rubber factory, they are also fluid filled, and once they crack and the fluid leaks out the life of the bushing is immensely diminished.
TGK Motorsport introduces its new Thrust Arm Spherical Monoballs! We designed this solution to deliver vastly improved durability over the OEM bushings, requiring no modifications and providing nearly instant response in cornering and braking for an enhanced driving experience. These monoballs feature a sealed OEM Lemforder ball joint known for its exceptional quality and longevity. The bearing assembly is precision CNC machined from 6061-T6 anodized aluminum with a knurled outer diameter for a perfect press fit and long-lasting durability. By using a sealed ball joint, We have achieved low-friction, no-bind suspension travel without unwanted deflection, resulting in superior steering precision, turn-in response, and direct braking feedback.
ATTN: Given the nature of the solid bushing and being press fit, measure the diameter of your arm before pressing the bushing in. OEM (and especially aftermarket) control arm hole diameters can vary pretty wildly. Interference of .002-.007” is ideal. Looser and they may knock around. Tighter and they may require extreme press forces and will be very likely to gall the mating surfaces during installation. If the interference is too high, you can lightly sand/file/ream the hole out until it’s in the correct range.
Specifications
| Material | 6061-T6 Anodized Aluminum |
| Ball Joint | OEM Lemforder Sealed |
| Fitment | B9 A4/S4/RS4/A5/S5/RS5 |
| Installation | Press Fit - No Modifications Required |
| Interference Fit | 0.002"-0.007" Ideal |
Features & Benefits
✓
OEM Lemforder Ball JointSealed design ensures exceptional quality and longevity with low-friction operation.
✓
Precision CNC Machined6061-T6 anodized aluminum construction with knurled outer diameter for perfect press fit.
✓
No Modifications RequiredDirect OEM replacement design installs without any vehicle modifications.
✓
Superior Steering PrecisionEliminates rubber bushing deflection for immediate turn-in response and direct feedback.
✓
Enhanced Braking ResponseNo-bind suspension travel delivers direct braking feedback and eliminates delays.
✓
Eliminates Common IssuesPrevents wheel shimmy, alignment shifts, uneven tire wear, and premature bushing failure.
Frequently Asked Questions
What interference fit is recommended for installation?
An interference of 0.002"-0.007" is ideal. Measure your control arm diameter before pressing as OEM and aftermarket arms can vary. If interference is too high, lightly sand/file/ream the hole to the correct range.
What Arms do these all fit?
With the huge variences in arm tolerances, we have only had consistent tolerances on OEM arms.
What happens if the interference fit is incorrect?
If too loose, the bushings may knock around. If too tight, extreme press forces will be required and may gall the mating surfaces during installation.
How do these improve over OEM rubber bushings?
They eliminate the deflection and premature failure issues of fluid-filled rubber bushings, providing superior steering precision, turn-in response, and direct braking feedback.
What makes the Lemforder ball joint special?
The sealed OEM Lemforder ball joint provides exceptional quality and longevity with low-friction, no-bind suspension travel without unwanted deflection.
Ease Of Install
NVH (Noise , Vibration, Harshness)
