• BMC cylindrical air filter for Porsche 911 and classic Mercedes-Benz - studio view 1
  • Cylindrical performance air filter for Porsche 911 1965-1973 2.0L 2.2L 2.4L 2.7L
  • Red classic Porsche 911 driving fast on a canyon road
  • Performance Air Filter Cylindrical for 911 1965-1973

Performance Cylindrical Air Filter for Porsche 911, Classic Mercedes SL / S (1958-1981)

$69.00
$69.00
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Superior Airflow for Porsche 911 Flat-Six and Mercedes-Benz Heritage Engines

Who It’s For: Designed specifically for the classic Porsche 911 and vintage Mercedes-Benz owners running the Porsche Flat-Six and Mercedes-Benz inline-six and V8 engine families. This is for the driver who values period-correct aesthetics but demands modern induction efficiency.

The Problem: Factory paper filters in these vintage airboxes are restrictive by design. The Porsche Flat-Six and the high-revving Mercedes Inline-6 engines rely on high-velocity air for optimal combustion. Stock paper elements are prone to clogging, degrade quickly with moisture, and typically only filter down to 10 microns, leaving your carburetors or mechanical fuel injection systems vulnerable to fine debris.

The Solution: We utilize BMC’s legendary cotton gauze technology to correct these legacy limitations. By using multi-layered cotton soaked in low-viscosity oil, this filter captures impurities as small as 7 microns while significantly increasing the volume of air reaching the intake. This results in sharper throttle response and a more pronounced induction note without sacrificing the protection of your vintage Flat-Six.

Why This is the Ultimate Upgrade

  • Enhanced Induction Efficiency: Flows significantly more CFM than standard paper, allowing your engine to breathe better at the top of the RPM range where these classic engines make their power.
  • Full Moulding Construction: Built using a proprietary "Full Moulding" system. Unlike cheap filters with glued or welded joints, this single-mould design prevents structural failure and air bypass.
  • Lifetime Durability: The epoxy-coated alloy mesh protects against fuel fumes and oxidation. This is a "buy it once" part—simply wash and re-oil with a regeneration kit instead of throwing away paper filters.

Technical Specifications

Fitment Porsche 911 2.0-2.7 (1965-1973); Mercedes-Benz /8 W114/115, S-Class W116, SL R107 / W113, SLC C107, W100 600, W108 / W109, W110 / W112, W111, Ponton W120 / W121 / W128 / W180; Opel Admiral A
Type Cylindrical filter
Dimensions 90mm inner x 140mm outer diameter
Part Number BMC FB232/07

Compatibility & OEM Reference

Fits the following vehicles (BMC fitment data):

  • Mercedes /8 (W114/115) 240 D 3.0 (80 HP) | 1974-1976
  • Mercedes /8 (W114/115) 250 CE (150 HP) | 1969-1972
  • Mercedes /8 (W114/115) 280 CE (185 HP) | 1972-1976
  • Mercedes S-Class (W116) 280 SE,SEL (177 HP) | 1972-1980
  • Mercedes S-Class (W116) 280 SE,SEL (185 HP) | 1972-1980
  • Mercedes SL (R107) 280 SL (177 HP) | 1976-1981
  • Mercedes SL (R107) 280 SL (185 HP) | 1974-1975
  • Mercedes SL (W113) 230 SL (150 HP) | 1963-1967
  • Mercedes SL (W113) 250 SL (150 HP) | 1966-1968
  • Mercedes SL (W113) 280 SL/8 (170 HP) | 1968-1971
  • Mercedes SLC (C107) SLC 280 (177 HP) | 1976-1981
  • Mercedes SLC (C107) SLC 280 (185 HP) | 1974-1981
  • Mercedes W100 - Pullmann 600 (250 HP) | 1964-1979
  • Mercedes W108 / W109 250 SE (150 HP) | 1966-1967
  • Mercedes W108 / W109 280 SE,SEL / 8 (160 HP) | 1968-1972
  • Mercedes W108 / W109 300 SEL / 8 (160 HP) | 1968-1972
  • Mercedes W108 / W109 300 SEL / 8 6.3 (250 HP) | 1968-1972
  • Mercedes W110 - 112 Limousine 220 SEB (120 HP) | 1959-1965
  • Mercedes W110 - 112 Limousine 300 SE (160 HP) | 1961-1965
  • Mercedes W110 - 112 Limousine 300 SE (170 HP) | 1964-1965
  • Mercedes W111 Coupe / Cabrio 220 SEB Coupe (120 HP) | 1961-1965
  • Mercedes W111 Coupe / Cabrio 250 SE Coupe (150 HP) | 1965-1967
  • Mercedes W111 Coupe / Cabrio 280 SE Coupe (160 HP) | 1967-1971
  • Mercedes W120,121,W128,W180 (Ponton) 220 SE (120 HP) | 1958-1960
  • Opel Admiral A 2.6 V6 (101 HP) | 1964-1965
  • Opel Admiral A 2.8 V6 (125 HP) | 1965-1969
  • Opel Admiral A 2.8 V6 HL (140 HP) | 1967-1969
  • Porsche 911 2.0 H6 Coupe (130 HP) | 1965-1967
  • Porsche 911 2.0 H6 E Coupe (140 HP) | 1969
  • Porsche 911 2.0 H6 E Targa (140 HP) | 1969
  • Porsche 911 2.0 H6 L Coupe (130 HP) | 1968
  • Porsche 911 2.0 H6 L Targa (130 HP) | 1968
  • Porsche 911 2.0 H6 S Coupe (160 HP) | 1967-1968
  • Porsche 911 2.0 H6 S Coupe (170 HP) | 1969
  • Porsche 911 2.0 H6 S Targa (160 HP) | 1967-1968
  • Porsche 911 2.0 H6 S Targa (170 HP) | 1969
  • Porsche 911 2.0 H6 T Coupe (110 HP) | 1969
  • Porsche 911 2.0 H6 T Targa (110 HP) | 1968-1969
  • Porsche 911 2.0 H6 Targa (130 HP) | 1967
  • Porsche 911 2.2 H6 E Coupe (155 HP) | 1970-1971
  • Porsche 911 2.2 H6 E Targa (155 HP) | 1970-1971
  • Porsche 911 2.2 H6 S Coupe (180 HP) | 1970-1971
  • Porsche 911 2.2 H6 S Targa (180 HP) | 1970-1971
  • Porsche 911 2.2 H6 T Coupe (125 HP) | 1970-1971
  • Porsche 911 2.2 H6 T Targa (125 HP) | 1970-1971
  • Porsche 911 2.4 H6 E Coupe (165 HP) | 1972-1973
  • Porsche 911 2.4 H6 E Targa (165 HP) | 1972-1973
  • Porsche 911 2.4 H6 S Coupe (190 HP) | 1972-1973
  • Porsche 911 2.4 H6 S Targa (190 HP) | 1972-1973
  • Porsche 911 2.4 H6 T Coupe (130 HP) | 1972-1973
  • Porsche 911 2.4 H6 T Targa (130 HP) | 1972-1973
  • Porsche 911 2.7 H6 Carrera RS (210 HP) | 1973
  • Porsche 911 2.7 H6 Carrera RS Touring (210 HP) | 1973

OEM Cross Reference (BMC): PORSCHE 90110895500, 90110895511; MERCEDES-BENZ 10943704, 6170940004, 945804, A0000945804, A0010943704, A6170940004

The Performance Promise

Buy with confidence. As specialists in European performance heritage, we ensure every filter meets the strict tolerances required for vintage Porsche and Mercedes airboxes. Backed by expert support and fast shipping.

Common Questions

Which vehicles does this filter fit?
BMC lists the Porsche 911 2.0 to 2.7 Carrera RS, many classic Mercedes-Benz SL, SLC, S-Class, W108 / W111 and Ponton models, and the Opel Admiral A.

Is it a direct fit?
Yes. It replaces the factory element in the stock airbox with no modifications.

Can I clean and reuse it?
Yes. Wash and re-oil it with a BMC regeneration kit.

How fine is the filtration?
The multi-layer oiled cotton traps particles down to 7 microns.

What will I notice after installing it?
Sharper throttle response and a stronger intake sound.

Fitment

Make

PorscheMercedes BenzOpel

Engine Size
  • 2.0L
  • 2.2L
  • 2.4L
  • 2.5L
  • 2.6L
  • 2.7L
  • 2.8L
  • 3.0L
  • 6.3L

Year
  • 1958
  • 1959
  • 1960
  • 1961
  • 1962
  • 1963
  • 1964
  • 1965
  • 1966
  • 1967
  • 1968
  • 1969
  • 1970
  • 1971
  • 1972
  • 1973
  • 1974
  • 1975
  • 1976
  • 1977
  • 1978
  • 1979
  • 1980
  • 1981

Installation & Tools

The Wrench Time

  • Estimated Time: 30-45 Minutes
  • Difficulty: 2/10 - Accessible vintage DIY, but requires extreme caution to avoid dropping foreign objects into open intake horns.

Tools You Will Need

  • 10mm combination wrench (battery disconnect and housing mounts)
  • Flathead screwdriver or 7mm nut driver (vintage hose clamps)
  • Clean shop rags or intake plugs (mandatory to seal throttle bores)
  • Needle-nose pliers (for factory retaining spring bails and clips)
  • Telescoping retrieval magnet (crucial vintage engine bay safeguard)
Mechanic’s Pro Tip (The "Gotcha"):
Dropping hardware down the open throats of your Weber, Zenith, or Bosch Mechanical Fuel Injection (MFI) velocity stacks is the cardinal sin on a 1965-1973 Porsche 911 longhood. The moment the factory cylindrical air housing lid comes off, immediately cover the intake runners with clean shop rags. Furthermore, the oil tank breather hose running to the back of the housing is likely rock-hard from decades of heat cycling; do not yank it, or you will snap the vintage metal spigot or split the unobtanium rubber elbow.

Phase 1: Removing the Factory Part

  1. Disconnect the Battery: Always start by opening the front trunk (frunk) and disconnecting the ground terminal on the battery using a 10mm wrench to prevent accidental electrical shorts while working near the starter and engine wiring harness.
  2. Clear Surrounding Engine Bay Linkages: Carefully inspect the engine bay of your 1965-1973 Porsche 911. Disconnect the oil tank crankcase breather hose from the rear snout of the cylindrical air assembly using a flathead screwdriver to loosen the vintage Norma clamp. Gently twist the hose to break the seal rather than prying directly against the metal housing.
  3. Release Housing Retaining Hardware: Depending on whether your longhood runs the early Knecht-style round canister or later central barrel assembly, release the perimeter wire spring clips using needle-nose pliers, or back off the central knurled wing nuts and retaining fasteners using a 10mm combination wrench. Set the washers and wing nuts directly into a magnetic parts tray immediately.
  4. Lift the Housing Lid and Seal Throttle Throats: Carefully lift off the top cover of the factory cylindrical air cleaner. Before pulling out the old filter element, immediately place clean, lint-free shop rags over all exposed intake trumpets and carburetor throats to ensure zero grit, crumbling gasket material, or loose washers fall into the cylinders.
  5. Extract the Old Filter: Slide the aged cylindrical paper or mesh element off its inner metal cage. Vacuum out any loose debris, dried pine needles, or dirt accumulated inside the bottom half of the factory air box base using a shop vacuum.

Phase 2: Installing the Performance Air Filter Cylindrical

  1. Clean and Inspect the Seating Flanges: Wipe down the internal mating surfaces and perforated support cage with a clean microfiber towel. Inspect the delicate throttle return springs and cross-bar linkage rods on your carbs or MFI stacks to verify full clearance and zero binding.
  2. Seat the New Performance Element: Carefully slide the new cylindrical performance air filter over the central mounting cage. Confirm that both the top and bottom rubber or polyurethane sealing beads sit completely flat and centered against the air cleaner canister base; an unseated bead will draw unfiltered hot air past the velocity stacks.
  3. Remove Temporary Plugs and Reinstall Housing Lid: Pull out the protective shop rags from the intake bores. Double-check that no stray hardware or tools remain inside the housing perimeter. Carefully align the top lid of the cylindrical canister onto the filter sealing lip, making sure the vintage internal alignment locating notches engage correctly.
  4. Secure Housing Fasteners: Re-engage the factory wire bails using needle-nose pliers, or thread the retaining nuts finger-tight before snugging them down with a 10mm wrench. Do not over-torque, as over-tightening will distort the vintage stamped sheet metal canister or crush the new filter skeleton. Reattach the oil breather hose to the housing neck and secure the clamp using a flathead screwdriver.
  5. Reconnect Battery and First Startup: Reconnect the ground terminal on your battery using a 10mm wrench. Turn the ignition key to prime the fuel pumps. On the first startup, the vehicle gas pedal should not be touched for 20 seconds until the ECU adjusts and the idle circuit stabilizes smoothly across all six cylinders.

Disclaimer: This is a general guide provided for the 1965-1973 Porsche 911. Always refer to your factory service manual for exact torque specifications and safety procedures.

Warranty

All products are backed by our Limited Lifetime Warranty. We stand by our quality. [See terms]
Performance Cylindrical Air Filter for Porsche 911, Classic Mercedes SL / S (1958-1981)

$69.00