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Air vents / grilles
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
Air exhaust duct, Rear Bumper
Genuine Porsche air guide for selected Porsche 997 body / bumper airflow applications.
This original Porsche air guide helps direct airflow through the correct factory channel, supporting cooling, aerodynamic airflow management and correct front or rear bumper-area assembly fitment where specified.
Fits:
Porsche 997 MK1 GT3 / GT3 RS 2007 - 2009
Diagram ref no 30
What This Product Does
This air duct forms part of the rear bumper assembly. It is an airflow component, rather than a complete bumper, bumper overrider or exhaust-system pipe.
Technical Details
- Brand: Porsche.
- Part number: 99750582391 / 99750582491
- Component identification: air exhaust / air duct.
- Assembly location: rear bumper.
Symptoms of Fault
Inspect the duct for cracking, distortion or impact damage when assessing the rear bumper assembly. Damage to adjacent bumper parts does not establish that this duct also needs replacing.
Why Replacement Matters
Air guides can become damaged through front or rear bumper removal, accident repair, road debris, heat, age or incorrect previous installation. A cracked or missing air guide may affect airflow routing, leave surrounding bumper components unsupported, or make the bumper area look incomplete.
Replacing it with a Genuine Porsche air guide restores the correct factory ducting and mounting arrangement.
Where It Fits on the Car
These air guides fit in the Porsche 997 bumper / body airflow guide area where specified. They are designed to direct airflow through the factory bumper or body ducting path. Correct side and location should be confirmed before ordering, as 99750582391 and 99750582491 are paired left/right-style references.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99750582
The product you are viewing cross references to these numbers
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
Rear bumper Air outlet frame
This original Porsche trim frame fits in the rear bumper air outlet / exhaust vent area, helping finish the bumper aperture correctly and maintain the factory Porsche exterior appearance.
Fits:
Porsche 997 GT3 / GT3 RS 2007 - 2009
Porsche 997.2 Special models '911 Sport Classic' (PR:756)
Porsche 997.2 Speedster (PR:503)
Diagram ref no 31
These frames are used in the rear bumper / rear air outlet area on selected Porsche 997 models.
What This Part Does / Functions
• Frames the rear bumper air outlet / exhaust vent opening
• Helps finish the bumper aperture to factory appearance
• Supports correct rear bumper trim alignment
• Helps secure or locate related rear bumper vent / grille components
• Replaces a cracked, missing, faded or damaged original frame
• Restores the correct rear bumper detail on GT and special-model bumpers
• Provides Genuine Porsche fitment, profile and finish
• Supports correct reassembly after bumper repair, paintwork or restoration.
Why Replace This Part?
Rear bumper air outlet frames can become damaged from bumper removal, accident repair, heat, road debris, track use or ageing. A cracked or missing frame can leave the rear bumper vent area looking unfinished and may prevent related trim or grille pieces from sitting correctly.
Replacing it with a Genuine Porsche rear bumper air outlet frame helps restore the factory bumper finish and correct Porsche trim fitment.
When to Replace This Part
• During rear bumper removal or refitting
• When replacing rear bumper vents, grilles or air outlet trim
• If the original frame is cracked, damaged or missing
• After rear bumper paintwork or accident repair
• During GT3, GT3 RS, Speedster or Sport Classic bumper restoration
• When correcting non-original or poorly fitted trim
• If the air outlet surround no longer clips securely
• When maintaining the car with Genuine Porsche exterior parts.
Where It Fits on the Car
This frame fits in the rear bumper air outlet / air exhaust vent area. It surrounds or supports the rear bumper vent opening depending on bumper type and specification.
Correct left/right selection is required before ordering.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99750581
The product you are viewing cross references to these numbers
Improve airflow, cooling, and appearance with rear bumper air vents and grilles from Design911. These components are designed to enhance aerodynamic performance, regulate heat around the exhaust area, and protect internal components from debris. Whether you’re restoring a classic Porsche, repairing damage, or upgrading to a sportier look, our air vents and grilles are built to OEM specifications for perfect fitment, strength, and durability.
Made from high-quality materials such as ABS plastic, aluminium, or carbon fibre, these parts not only deliver functional performance but also elevate your Porsche’s exterior styling. Design911 offers a wide selection of rear bumper vents, outlet grilles, and mesh inserts suitable for both classic and modern Porsche models.
Rear Air Outlet Grilles
OEM-style rear grilles designed to optimise airflow and reduce heat buildup around the exhaust and rear bumper area.
Rear Bumper Vent Panels
Precision-moulded vent panels that enhance aerodynamic
efficiency while adding a distinctive, performance-oriented look to your
Porsche.
Cooling Mesh Inserts
Protective mesh inserts that prevent debris from entering
the bumper cavity while allowing efficient airflow through the body panels.
Classic Porsche Rear Grilles
Authentic reproduction air vents and grilles for classic
models such as the 356, 911 Classic, and 964. Perfect for concours-level
restorations.
Carbon Fibre & Performance Grilles
Lightweight, high-strength performance grilles designed for
improved cooling and race-inspired aesthetics. Ideal for modern and motorsport
Porsche models.
Mounting Clips & Fitting Hardware
OEM-quality fittings, clips, and brackets for secure,
vibration-free installation of Porsche rear bumper vents and grilles.
