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Your Vehicle  //  Porsche  //  991 (911) MK2 2016-2019  //  Any
Porsche991 (911) MK2 2016-2019Brakes

Duct Spoiler / Air Scoop

Duct Spoiler / Air Scoop

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DISPLAYING 1 to 6 (of 6 products)
Front brake duct air scoop. Porsche 991 - 99134148302, 99134148402
3
Front brake duct air scoop. Porsche 991
Special Order item
99134148
Product Information
Product Information
Front cross member spoiler.

Fits:
Porsche 991.1 C2S / C4S 2012-16
Porsche 991.2 C2S / C4S 2017-18 Cars without ceramic brake
Porsche 991 Turbo 2014-18 Cars without ceramic brake

Click 'Zoom in' for large parts diagram.
Diagram ref no 13

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Related, superseded, cross reference or alternative numbers for comparison.

99134148
99134148302
99134148402

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Air duct brake cooling rear. Porsche 991 GT2 RS / 991 GT3 / Speedster - 99157543180, 99157543280
4
Air duct brake cooling rear. Porsche 991 GT2 RS / 991 GT3 / Speedster
Special Order item
99157543
Product Information
Product Information
Air duct brake cooling rear. 

Fits:
Porsche 991 GT2 RS - 2014 to 2019
Porsche 991 GT3 / GT3 RS - 2014 to 2019

Porsche 991 Speedster - 2016 to 2019

Diagram ref no 24



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Related, superseded, cross reference or alternative numbers for comparison.

99157543
99157543180
99157543280

The product you are viewing cross references to these numbers
Air Duct For Brake Cooling. Porsche 991.1 R / GT3 / RS / 991.2 GT2 RS / GT3 / GT3 RS 2014-19 - 99133148, 99133148181, 99133148281, 99133148280, 99133148180
4
Air Duct For Brake Cooling. Porsche 991.1 R / GT3 / RS / 991.2 GT2 RS / GT3 / GT3 RS 2014-19
Special Order item
99133148
Product Information
Product Information
Air Duct For Brake Cooling.

Fits:
Porsche 991.1 R / GT3 / RS MKI 2012>>2016
Porsche 991.2 GT3 / GT3 RS / GT2 RS / Speedster MKII 2016>>2019

Diagram Ref No 26

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Related, superseded, cross reference or alternative numbers for comparison.

99133148
99133148
99133148181
99133148281
99133148280
99133148180

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Front brake air duct air. Porsche 981 Cayman GT4 2016 - 98157513180, 98157513280
4
Front brake air duct air. Porsche 981 Cayman GT4 2016
Special Order item
98157513
Product Information
Product Information
Front brake air duct air.

Fits:
Porsche 981 Cayman GT4 2016-16

Click 'Zoom in' for large parts diagram.
Diagram ref no 33

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

98157513
98157513180
98157513280

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Front brake duct air scoop. Porsche 991 R/GT3/RS - 99134148380, 99134148480, 99134148383, 99134148483
2
Front brake duct air scoop. Porsche 991 R/GT3/RS
Special Order item
99134148
Product Information
Product Information
Front Brake Duct Air Scoop.

Fits:
Porsche 991 R/GT3/RS 2014>> incl Speedster

Diagram ref no 8

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

99134148
99134148380
99134148480
99134148383
99134148483

The product you are viewing cross references to these numbers
Input Shaft Air Guide, Left or Right. Porsche 991.1 R / 991.2 GT3 / GT3 RS / GT2 RS 2014-20 - 99157511881, 99157511781
1
Input Shaft Air Guide, Left or Right. Porsche 991.1 R / 991.2 GT3 / GT3 RS / GT2 RS 2014-20
Special Order item
99157511
Product Information
Product Information

This Porsche input-shaft air guide is the air duct and belongs to the assembly containing the cross member and side parts.

Fits

  • Porsche 991.1 R 4.0L 2016
  • Porsche 991.1 GT3 2014-2016  
  • Porsche 991.2 GT3 2017–19
  • Porsche 991.2 GT2 RS 2018–19

    Diagram ref no: 40 (both sides)


What This Product Does

The duct guides air along the route provided around the input shaft. It forms part of the surrounding cross-member arrangement, rather than being a transmission shaft or a complete undertray. Its location and attachment must correspond to the vehicle's original assembly.

Functions

  • Channels airflow around the input shaft.
  • Completes the original air-guiding arrangement.
  • Provides a replacement for an absent or damaged duct.

    Technical Details
  • Brand: Porsche; genuine part.
  • Exploded-diagram description: Air guide Input shaft.
  • Component type: air duct; position: Left/Right.
  • Quantity: 1.
  • Assembly: Cross member

    Symptoms of Fault
  • Cracking, deformation or other visible impact marks.
  • Damaged attachment points preventing secure positioning.
  • Rattling associated with a duct that has become loose.
  • An incomplete air path where the guide is absent.
  • Contact marks indicating rubbing against nearby components.

    Why Replacement Matters

Renewing an unserviceable guide reinstates the factory duct layout. Check adjacent rear-axle components, mounting locations and fixings during installation: damage elsewhere may prevent the replacement from sitting correctly. Secure positioning helps avoid unwanted contact and vibration.

FAQs

How should compatibility be confirmed?
Match part to the vehicle's VIN, derivative and original assembly. Check fitment for your specific vehicle (model, year, engine) before ordering.



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

99157511
99157511881
99157511781

The product you are viewing cross references to these numbers
DISPLAYING 1 to 6 (of 6 products)
Also found on these pages
About Duct Spoiler / Air Scoop
Brake Duct Spoilers & Air Scoops - Enhanced Brake Cooling for Road & Track Use

Brake duct spoilers and air scoops are aerodynamic cooling components designed to direct airflow toward the brake discs and calipers, helping to reduce operating temperatures during spirited road driving, track days, and motorsport use. By increasing airflow to critical braking components, these parts improve heat dissipation, reduce brake fade, and help maintain consistent braking performance under heavy load.

Available from Design911, brake duct spoilers and air scoops are a proven upgrade for performance-focused vehicles where standard brake cooling is insufficient for repeated heavy braking.

What Do Brake Duct Spoilers & Air Scoops Do?
Brake duct spoilers and air scoops manage airflow around the braking system.

Core Functions:
  • Channel cool air directly toward brake discs and calipers.
  • Reduce brake operating temperatures.
  • Help prevent brake fade during repeated heavy braking.
  • Improve braking consistency and pedal feel.
  • Support high-performance and track-focused braking systems.
  • By improving airflow, these components help braking systems operate within optimal temperature ranges.

Why Do Brake Duct Spoilers & Air Scoops Fail?
Brake cooling components are exposed to harsh environments.

Common Causes of Wear or Failure Include:
  • Impact damage from road debris or kerbs.
  • Heat exposure from prolonged braking.
  • Material fatigue due to vibration and airflow stress.
  • Incorrect fitment or mounting damage.
  • Environmental exposure to moisture and road contaminants.
  • When duct spoilers or air scoops are damaged or missing, brake temperatures can rise, reducing braking efficiency and increasing component wear.

Why Replace or Upgrade Brake Duct Spoilers & Air Scoops?
Replacing damaged or worn brake cooling components restores effective airflow and braking reliability.

Key Benefits:
  • Improved brake cooling and reduced fade.
  • More consistent braking performance under load.
  • Extended life of brake discs, pads, and fluid.
  • Ideal upgrade for fast road and track use.
  • Helps protect braking components from heat-related damage.
  • Brake duct spoilers and air scoops are an essential upgrade for vehicles subjected to demanding braking conditions.  


Highlights

  • Aerodynamic brake cooling components.
  • Direct airflow to brake discs and calipers.
  • Reduce brake fade and thermal stress.
  • Suitable for road, fast road, and track use.
  • Essential for performance braking setups.       

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