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Air Filters
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- 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
Heating Pipe This a replica of the Porsche Germany RS lightweight factory heat duct that was used on all 3.6 litre special RS lightweight rare cars. The Porsche part is ugly roto-formed cheap plastic with parting lines whereas accurate replica is carbon fiber. Saves 8 to 9lbs about 4Kg from the rear of all 964's and 993's. Will not work on C2 Turbos/965 cars. Replaces blower motor assembly and ductwork and still allows plenty of heat just like the factory RS part. Ultra cool clear coated real carbon fiber tube that really cleans up engine bay and makes working on engine easy.
Air induction pipe: This a replica of the Porsche Germany RS lightweight factory air duct that was used on all 3.6 liter special RS lightweight race cars. The air duct is directed up towards the boot lid where air is forces into the air duct and then into the air box. Simple do it yourself installation that gives you the RS style engine look.
Please Note:
All late model 993's 1996-98 (Varioram engines) require the 964 early type fan air guide shroud (as shown on exploded image)
Can be added below
Due to manufacturing tolerances and the nature of composite materials, minor trimming of excess material may be required during installation to ensure optimal fitment.
Fits:
Porsche 964 C2/C4 1989-1994
Porsche 993 C2/C4 1994-1997
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
INDUCTION964
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
Parts include - free flow air filter and modified air box cover.
Fits:
Porsche 993 Carrera 3.6L
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
AIRBOXKIT03
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
Parts include - free flow air filter and modified air box cover.
Fits:
Porsche 993 Carrera 3.6L
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
AIRBOXKIT01
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
M181
The product you are viewing cross references to these numbers
- 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
Cooler air = MORE POWER + 8-10BHP.
Cone filters have superior air flow characteristics as compared to flat panel filters. The cone filter better structures the air as it enters through the filter and the additional intake length and shape of this system further increases air flow for smoother straighter more formed air.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99316700
The product you are viewing cross references to these numbers
Includes special BMC detergent and an oil applicator - in either spray bottle or liquid form.

HOW IS A BMC FILTER REGENERATED?
We recommend using original BMC kits only, as other products may not be effective or may damage the filter permanently, thus invalidating the warranty.
We recommend regenerating the filter (washing + oil application) every 20.000 – 25.000 km to ensure best performance and long service life.
This value is a rough estimate and can vary based on the climatic conditions and the ground on which the vehicle is used (sand, dirt roads, etc.).
The various steps to be carried out in order to regenerate the filtering element are indicated in the instructions contained in the regeneration kit.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
WA2
The product you are viewing cross references to these numbers
- 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

This Product Fits:
Porsche 993 Carrera / 993 Turbo
Panel Filter Size:
- width - 240mm
- height - 325mm
BMC air filters are designed and produced to ensure a higher air flow than original paper filters. In F1, for example, BMC cotton filters minimize the loss of air flow pressure passing through the air filter; this way ensures the best conditions for full exploitation of maximum power. Therefore the benefits of replacing the original paper filter with BMC cotton air filter, produced using the same technology and materials as the F1 air filters, are evident.
DESIGN AND MATERIALS
Qualified engineers using advanced software and expert technicians using the latest technologies produce BMC air filters. An F1 filter must be very light, must be made of the best raw materials and must improve performance. For this reason we use only alloy mesh with epoxy coating to ensure protection from petrol fumes and from oxidization due to the humidity of the air. The filtering material is composed of a special cotton gauze soaked with low-viscosity oil to give you the best air permeability.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FB136
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- 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
The Porsche part is ugly roto-formed cheap plastic with parting lines whereas accurate replica is carbon fiber.
Saves 8 to 9lbs about 4Kg from the rear of all 964's and 993's. Will not work on C2 Turbos/965 cars.
Replaces blower motor assembly and ductwork and still allows plenty of heat just like the factory RS part.
Ultra cool clear coated real carbon fiber tube that really cleans up engine bay and makes working on engine easy.
Please Note:
All late model 993's 1996-98 (Varioram engines) require the 964 early type fan air guide shroud (as shown on exploded image)
Can be added below
Due to manufacturing tolerances and the nature of composite materials, minor trimming of excess material may be required during installation to ensure optimal fitment.
Fits:
Porsche 964 C2/C4 1989-1994
Porsche 993 C2/C4 1994-1997
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
964167003
The product you are viewing cross references to these numbers
- 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

FEATURES:
• Fits all Porsche 993 vehicles (1994-1998)
• Adds 8 whp and improves throttle response and sports car sound
• Optional BMC Air Filter upgrade available
• Simple DIY installation; installs in 5 minutes!
• All Fabspeed performance products are backed by the Fabspeed Lifetime Limited Warranty.
Please note: This is a special-order item manufactured to order. In some cases, please allow 4 – 5 weeks for the delivery. Special order items cannot be cancelled from this supplier once your order has been placed.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR993ABX
The product you are viewing cross references to these numbers
- 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

This Product Fits:
Porsche 993 3.6L 1993-97
Porsche 993 3.8L 1995-97
K&N® washable, reusable High-Flow Air Filters™ feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower.
Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's 10-Year/Million Mile Limited Warranty.
K&N drop-in replacement filters are designed to install easily into your factory air box.
Works with Original Equipment Manufacturer Vehicle Electronics.
Environmentally Friendly, K&N Reusable Air Filters
Upgrade today and start enjoying superior airflow and superior performance from K&N's most popular product!
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
33-2731
The product you are viewing cross references to these numbers

K&N Recharger Kit 99-5000EU is designed for cleaning your K&N oiled cotton air filter when it is time to be serviced.
Part 99-5000EU is labeled in English, Spanish, Swedish, Polish and Czech for use in Europe.
The kit comes with K&N Power Kleen air filter cleaner and air filter oil.
99-5000EU will restore air flow efficiency and will bring your K&N oiled cotton air filter to like new condition. K&N Power Kleen works to dissolve the dirt build up and old filter oil, and can be washed away with water. After the air filter fully dries re-oil your air filter then reinstall it.
This Recharger Kit comes with a 204 milliliter aerosol spray can of oil and a 355 milliliter K&N pump bottle of Power Kleen air filter cleaner.
NOTE: This product has got shipping restrictions for export
Please note this item can not be sent out by plane. Deliveries only to European countries by road service
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99-5000EU
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- 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

Fits
Porsche 911 - Air cooled engine with custom ITG racing set-up
Kit Includes
Please see the PMO vs OE Carb Overview
Engine Tuning Performance Air Filters – Maximise Airflow and Power for Your Porsche
A performance air filter is one of the most effective and accessible upgrades for improving your Porsche’s engine performance and responsiveness. Designed to increase airflow while providing superior filtration, these filters enhance combustion efficiency, throttle response, and horsepower output — making them essential for both road and track enthusiasts.
At Design911, we offer a premium selection of high-performance air filters and engine tuning intake upgrades for Porsche models. Manufactured using advanced filtration media and precision-engineered housings, these filters deliver improved airflow without compromising protection. Whether you’re upgrading a 911 Turbo, Cayman GT4, or Boxster, our manufacturer-quality performance air filters ensure long-lasting performance and reliability.
What Do Performance Air Filters Do?
Performance air filters allow your Porsche’s engine to breathe more efficiently by reducing airflow restriction and enhancing fuel-air mixture quality.
Core Functions:
- Increase
airflow to the engine for better combustion and power.
- Filter
harmful particles such as dust, dirt, and debris to protect the
engine.
- Improve
throttle response and engine smoothness.
- Enhance
engine sound and performance feel.
- Support long-term engine health by maintaining clean airflow.
By optimising the air intake system, a performance air filter helps your Porsche deliver sharper acceleration, greater efficiency, and improved drivability.
Why Do Air Filters Fail or Degrade?
Air filters operate in a harsh environment, exposed to debris, oil vapour, and temperature extremes. Over time, they can become clogged or damaged, restricting airflow and reducing performance.
Common Causes of Failure Include:
- Clogging
from dirt, dust, or pollen build-up.
- Oil
contamination (especially in reusable filters).
- Physical
damage to the filter material or seals.
- Improper cleaning or maintenance.
- Extended service intervals causing reduced airflow.
Symptoms of a failing air filter include reduced engine power, poor fuel economy, hesitation under acceleration, or unusual intake noise. Replacing or upgrading ensures consistent performance and protection.
Why Replace with a High-Performance Air Filter?
Upgrading to a precision-engineered performance air filter restores and enhances your Porsche’s breathing efficiency. These filters are designed to provide a perfect balance between airflow and filtration, delivering measurable performance gains.
Key Benefits:
- Increases horsepower and torque output.
- Improves throttle response and fuel efficiency.
- Provides superior filtration for engine longevity.
- Constructed from durable, reusable materials.
- Direct-fit
compatibility for Porsche 911, Cayman, Boxster, Panamera and more.
- Ideal for performance tuning, track driving, or spirited road use.
Replacing restrictive stock filters with high-performance alternatives enhances both performance and reliability — essential for enthusiasts who demand the best from their Porsche.
Highlights:
- High-performance air filters for Porsche tuning and upgrades.
- Improved airflow, filtration, and power delivery.
- Reusable and washable filter options available.
- Engineered for precision fit and durability.
- Perfect for classic and modern Porsche performance models.
- Supports both performance gains and long-term engine protection.