Please wait… 
Please wait while we process your order,
do not press the back button… 
Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://www.design911.co.uk/images/schemaLogo.png https://www.design911.co.uk/images/schemaLogo.png +443456003478 https://www.design911.co.uk Facebook Instagram
Check vehicle fitment
Special Order item
99134104
Product Information
Product Information
Control arm, Front
These Porsche Genuine OE Front Control Arms (Part Nos. 99134104187 Left & 99134104287 Right) are original factory front suspension wishbones / lower control arms designed for Porsche 991 GT3, 982 Boxster Spyder and 982 Cayman GT4. Complete with integrated bushes and ball joints, they ensure precise steering response, stable suspension geometry, and factory handling characteristics both on road and track. As genuine Porsche parts, they guarantee exact fitment, durability, and OEM-level chassis performance.

Fits:
Porsche 991 GT3 2014 - 2021
Porsche 982 (718) Boxster Spyder 2019>>
Porsche 982C (718C) Cayman GT4 2019>>

Diagram ref No 6

The control arms connect the wheel carrier to the front axle subframe, controlling suspension movement during:
Steering input
 Braking
 Cornering
 Suspension compression and rebound

They maintain correct wheel alignment and suspension geometry while ensuring precise steering response and high-speed stability.

The integrated ball joints allow smooth articulation, while the suspension bushes absorb vibration and road harshness without compromising the sharp handling characteristics expected from Porsche GT models.

Functions & Technical Role
  Suspension geometry control: Maintains accurate wheel positioning and alignment
  Steering precision: Supports sharp and responsive steering feel
  Integrated ball joints: Allow controlled suspension articulation
  Vibration damping: Bushes reduce harshness and unwanted movement
  GT chassis stability: Designed for high-performance driving and track use
•  OEM engineering: Manufactured to Porsche factory tolerances for exact fitment and durability

The front control arms play a major role in steering accuracy, suspension stability, and tyre wear control. Worn bushes or ball joints can negatively affect handling precision and overall driving dynamics.

When to replace
  Knocking or clunking from the front suspension
  Excessive play in bushes or ball joints
  Uneven tyre wear or alignment issues
  Steering instability or vague handling
  During suspension rebuild or track-preparation work

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99134104
99134104180
99134104181
99134104185
99134104187
99134104280
99134104281
99134104285
99134104287

The product you are viewing cross references to these numbers
Related products