Porsche 911 Carrera 3.2 Clubsport
The Porsche 911 Carrera 3.2 Clubsport, designated internally as option M637, was Porsche's answer to customers who wanted a road-legal 911 stripped of unnecessary weight for spirited driving and club-level motorsport. Produced in extremely limited numbers between 1987 and 1989, the Clubsport has become one of the most sought-after variants of the celebrated G-body 911 generation.
The Clubsport program focused on systematic weight reduction rather than increased power. The 3.2-liter air-cooled flat-six remained mechanically identical to the standard Carrera's engine, producing 231 horsepower through Bosch Motronic fuel injection. Where the Clubsport differed dramatically was in what Porsche removed from the car. Sound deadening material was stripped entirely. The rear seats were deleted. Air conditioning was not available. Power windows, central locking, and electric mirror adjustment were all removed. The radio and its associated wiring were deleted. Even the passenger-side sun visor was initially omitted. The result was a weight saving of approximately 50 kilograms, bringing the curb weight down to around 1,160 kilograms.
The suspension received meaningful upgrades appropriate to the car's sporting intent. Stiffer springs lowered the ride height by 30mm compared to the standard Carrera. Bilstein sport shock absorbers provided tighter body control without excessive harshness. Thicker front and rear anti-roll bars reduced body roll through corners. The overall effect was a 911 that felt more immediate, more responsive, and more connected than the already excellent standard car.
Sporting details extended throughout the car. Lightweight bucket seats replaced the standard thrones. Door cards were simplified with pull-strap releases. Thinner glass was fitted to reduce weight further. The car rolled on Fuchs 15-inch or optional 16-inch wheels. An engine oil cooler with thermostat was standard equipment, reflecting the car's intended use on track days and spirited mountain road driving.
The Clubsport was equipped with the later G50 five-speed gearbox, widely regarded as one of the finest manual transmissions Porsche ever produced. Its precise, mechanical shift action provided a direct and satisfying connection between driver and drivetrain. The hydraulic clutch was light but communicative, and the gearbox was strong enough to withstand the rigors of competitive use.
Driving a 911 Carrera 3.2 Clubsport reveals the essence of what makes the air-cooled 911 so beloved. Without sound deadening, the flat-six's mechanical symphony fills the cabin from idle to redline. The lighter weight is immediately apparent in the car's responses to steering, braking, and throttle inputs. The torsion-bar suspension, freed from the obligation to provide luxury-car ride quality, communicates every surface change with crystalline clarity. The rear-engine layout demands respect, but in skilled hands the Clubsport rewards with a level of driver engagement that few modern cars can approach.
Porsche initially designated the Clubsport with option code M637, but some early examples carried the M506 code denoting a slightly different specification. The total production of Clubsport variants remains a subject of debate among enthusiasts, with estimates ranging from 340 to 400 units. Many were delivered in Grand Prix White, Guards Red, or Black, though the full Porsche color palette was technically available. A handful of cars were ordered in special colors that now command significant premiums.
In the hierarchy of air-cooled 911 collectibility, the 3.2 Clubsport occupies a fascinating position. It is rarer than the 964 Carrera RS that succeeded it in spirit, and it represents the final evolution of the original torsion-bar 911 chassis in lightweight form. Values have climbed steadily, with exceptional examples now reaching $400,000-$500,000 at auction. The Clubsport proved that sometimes the best way to make a great car better is not to add more, but to take away everything unnecessary. That philosophy, born in the spartan cockpit of the M637, continues to define Porsche's most focused road cars to this day.
Verify M637 Clubsport option code through Porsche Certificate of Authenticity. Ensure lightweight components have not been replaced with standard Carrera items. Check that rear seats remain deleted and sound deadening has not been re-added. The G50 gearbox should shift cleanly with no grinding on synchros. Engine should be a matching-numbers 3.2 producing 231 hp. Inspect torsion bar mounting points, front strut towers, and longitudinal members for rust or fatigue cracking. Oil cooler thermostat should function correctly. Bilstein sport dampers may need replacement. Verify Clubsport-specific spring rates. Documentation and provenance are extremely important given the car's rarity. Beware of standard Carreras that have been retroactively lightened and presented as Clubsports.
Approximately 340 Clubsport units produced between 1987 and 1989 model years. Option code M637 designated the full Clubsport package. Some sources cite up to 400 units including partial specifications. Most were right-hand-drive UK market cars, with a smaller number for Continental Europe and Japan. Not officially available in the USA market. Each car was individually specified by its buyer, leading to slight variations in equipment deletion.