Airbox / Housings

Carbon Fibre Air Box Intake System - Non Varioram Cars

Bring more character from the air-cooled flat-six in your Porsche 993 with the Rennline Carbon Fibre Air Box Intake System.

Developed as a functional and visual upgrade for the original intake system, the Rennline air box is designed to improve airflow, enhance induction sound and replace ageing factory plastic components with premium motorsport-inspired carbon fibre.

Fits:

• Porsche 993 (911) C2 1994-95
• Porsche 993 (911) C4 1994-95
• Porsche 993 (911) C2S 1994-95
• Porsche 993 (911) C4S 1994-95

The Porsche 993 represents the final evolution of the air-cooled 911, and its flat-six engine is a major part of the driving experience. Rennline's intake system allows more of that character to be heard, delivering a more engaging induction note while giving the engine bay a cleaner, more purposeful appearance.

Carbon Fibre Intake Upgrade

The Rennline air box replaces the decades-old factory plastic intake components with lightweight carbon fibre construction. Its exposed carbon weave provides a premium finish that works particularly well in restored, modified and performance-focused Porsche 993 engine bays.

Unlike a purely cosmetic carbon fibre replacement, this system has been developed as a functional intake upgrade, with increased airflow and a more pronounced induction sound helping to make the naturally aspirated flat-six feel more engaging from behind the wheel.

What Does the Rennline Carbon Fibre Air Box Do?

The air box forms an important part of the engine's intake system, directing filtered air towards the engine while providing a controlled path for airflow.

Rennline's redesigned carbon fibre system is engineered to improve airflow compared with the ageing factory arrangement while allowing more of the characteristic flat-six induction sound to reach the driver.

The result is a modification that enhances the driving experience without compromising the classic character that makes the Porsche 993 so distinctive.

Why Upgrade the Original Porsche 993 Air Box?

Original Porsche 993 intake components are now decades old. Repeated heat cycles, vibration and general ageing can leave plastic components faded, brittle or cosmetically tired.

Replacing the original air box with the Rennline carbon fibre system provides an opportunity to refresh the intake while introducing several improvements:

• Increased intake airflow
• Enhanced flat-six induction sound
• Lightweight carbon fibre construction
• Reduced weight compared with ageing factory components
• Improved engine bay appearance
• Premium motorsport-inspired carbon weave
• More engaging throttle and induction character
• Purpose-designed for the Porsche 993

Enhanced Air-Cooled Flat-Six Sound

One of the principal attractions of this intake upgrade is sound.

The naturally aspirated air-cooled flat-six is central to the character of the Porsche 993, and the Rennline intake allows more of its induction note to be heard as engine speed and throttle opening increase.

This creates a stronger connection between throttle input and engine response, particularly during enthusiastic driving, without changing the fundamental character of the 993.

Premium Carbon Fibre Construction

Carbon fibre provides a natural choice for a performance-focused intake system, combining low weight with a distinctive motorsport appearance.

The exposed weave transforms an area normally dominated by black factory plastic and makes the air box a prominent feature within the 993 engine bay. It pairs particularly well with other carbon fibre engine components and performance upgrades.

Porsche 993 Carbon Fibre Intake Upgrades

Carbon fibre intake systems are a popular upgrade for owners looking to combine performance-focused engineering with improved engine bay presentation.

For the Porsche 993, where many original plastic components are now several decades old, a high-quality carbon fibre air box provides an effective way to modernise the intake while respecting the character of the final air-cooled 911 generation.

The Rennline system is particularly suited to owners searching for a Porsche 993 carbon fibre air box, 993 induction upgrade or lightweight intake system that provides both functional and visual improvements.

Benefits of Upgrading

Installing the Rennline Carbon Fibre Air Box can provide:

• Improved intake airflow
• More engaging induction sound
• Reduced intake component weight
• Replacement of ageing factory plastics
• Premium carbon fibre engine bay appearance
• Enhanced flat-six driving experience
• Motorsport-inspired styling
• A high-quality upgrade for restored or modified Porsche 993 models

Carbon Fibre Rear Window Air Intake Kit

Transform the appearance and functionality of your Porsche 993 with this premium Carbon Fibre Rear Window Air Intake Kit. Inspired by motorsport engineering and modern restomod design, this innovative system channels air from specially designed rear quarter windows through a central carbon fibre intake tube, delivering a unique visual statement while providing a functional airflow path to the engine bay.

Fits:

• Porsche 993 (911) C2 1994-97
• Porsche 993 (911) C4 1994-97
• Porsche 993 (911) RS 1994-97
• Porsche 993 (911) C2S 1994-97
• Porsche 993 (911) C4S 1994-97
• Porsche 993 (911) TURBO 1994-96
• Porsche 993 (911) GT2 1994-97
• Porsche 993 (911) TURBO S 1994-97

Designed exclusively for Porsche 993 Coupe models, this kit combines lightweight carbon fibre construction, CNC-machined aluminium components and factory-tinted acrylic side windows to create one of the most distinctive upgrades available for air-cooled Porsche enthusiasts.

Whether you're building a high-end restomod, creating a track-inspired road car or simply looking for a unique engine bay airflow solution, this system delivers a stunning combination of form and function.

What Does the Rear Window Air Intake Do?

The system draws air through specially supplied factory green-tinted acrylic rear side windows and channels it through a central carbon fibre intake tube.

When installed with the optional rear shelf opening, the intake system:

• Directs additional airflow towards the engine bay
• Creates a motorsport-inspired induction pathway
• Enhances engine compartment ventilation
• Provides a unique performance appearance
• Adds distinctive visual character to the vehicle
• Delivers authentic race-inspired styling

The result is a striking rear cabin feature that instantly differentiates your Porsche from standard models.

Functional or Cosmetic Installation Options

One of the unique advantages of this system is installation flexibility.

Functional Air Intake Installation

Using the supplied cutting template, an opening is created in the rear shelf structure, allowing airflow from the intake system to reach the engine compartment.

Benefits include:

• Functional engine bay air feed
• Enhanced airflow routing
• Authentic motorsport-inspired setup
• Maximum visual and engineering impact

Non-Cut Cosmetic Installation

The system can also be securely mounted without cutting the rear shelf.

Benefits include:

• Fully reversible appearance upgrade
• No structural modifications required
• Maintains originality
• Creates the same visual impact

Please note - without cutting the rear shelf, no air is routed into the engine bay and the installation serves as a styling enhancement only.

Premium Carbon Fibre Construction

At the centre of the system is a lightweight carbon fibre intake tube incorporating an integrated debris protection system.

Features include:

• Lightweight carbon fibre construction
• Internal black debris mesh installed
• Motorsport-inspired appearance
• Excellent rigidity and durability
• Available in multiple finish options

Carbon Fibre Finish Options

Choose from:

• Raw visible carbon fibre (no clear coat)
• Gloss clear coat finish
• Satin clear coat finish

All options utilise the same high-quality carbon construction and differ only in appearance.

CNC-Machined Aluminium Window Bezels

The intake windows connect to the carbon tube using precision CNC-machined aluminium joints.

Available finishes include:

• Polished aluminium
• Matte silver
• Matte black

Each bezel incorporates an internal wire mesh screen designed to prevent leaves, stones and road debris from entering the intake system.

Factory Green-Tinted Rear Side Windows

The kit includes replacement rear quarter windows manufactured in factory-style green-tinted acrylic.

Benefits include:

• OE-inspired appearance
• Lightweight construction
• Clean integration with the intake system
• Excellent visual clarity
• Motorsport-inspired styling

Debris Protection Built In

To protect the engine bay and intake pathway, each aluminium bezel includes a factory-installed wire mesh insert.

This helps prevent:

• Stones Leaves
• Dirt Road debris
• Foreign objects

The mesh is installed during manufacturing and requires no additional assembly.

Important Compatibility Note

Due to differences in C-pillar geometry, this system is not compatible with:
Porsche 993 Targa

Please confirm vehicle body style before ordering.

Included in the Kit

Every kit includes:

• Carbon fibre intake tube
• Integrated debris protection mesh
• Left-hand rear side window in factory green tint
• Right-hand rear side window in factory green tint
• CNC-machined aluminium connecting bezels
• Cutting template
• Full installation guide

Why Upgrade?

This rear window air intake system is one of the most visually striking upgrades available for Porsche 993 Coupe models.

Benefits include:

• Unique motorsport-inspired styling
• Lightweight carbon fibre construction
• Functional airflow capability
• Premium CNC-machined components
• Restomod-inspired appearance
• Enhanced engine bay aesthetics
• Highly distinctive rear cabin design
• Exclusivity and rarity