Input Shaft Air Guide, Left or Right. Porsche 991.1 R / 991.2 GT3 / GT3 RS / GT2 RS 2014-20 › 99157511

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Related, superseded, cross reference or alternative numbers for comparison.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

The product you are viewing cross references to these numbers