The Porsche 964 Speedster is a rare and sought-after variant, produced in limited numbers from 1989 to 1994. Its exclusivity means that finding the correct parts can be a challenge, whether you are restoring a barn find or maintaining a cherished driver. This guide covers the key components you need to know, from body panels to engine internals, and offers practical advice for sourcing them.
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Body and Exterior Parts
Steel and Composite Panels
The 964 Speedster shares many body panels with the standard Carrera 2, but some are unique. The most distinctive is the shortened windscreen – it is 20 mm lower than the coupe’s. If yours is cracked, replacements are available from Porsche Classic or aftermarket suppliers like Pilkington. The rear deck lid also differs because the Speedster lacks a rear seat and has a unique soft top mechanism. OEM steel panels are still in production, but be prepared for lead times. For front fenders, doors, and rear quarters, standard 964 parts fit, but ensure you order the correct side and check for rust in the battery tray area.
Soft Top and Tonneau Cover
The fabric soft top is a defining feature. Porsche used a specific single-layer canvas with a unique frame. New old stock (NOS) tops surface occasionally, but most owners turn to aftermarket specialists like GAHH or Convertible Service. These offer reproduction tops that match the original weave and fit. The tonneau cover – which hides the folded top – is often warped or cracked. Correct replacements are hard to find; consider having yours repaired by an upholstery shop rather than gambling on a used one.
Trim and Badging
Chrome trim pieces, such as the window surrounds and rocker panel strips, are shared with the 964 Targa and Cabriolet. However, the ‘SPEEDSTER’ script on the rear deck and the model-specific emblem are unique. Reproduction badges are available, but the font and color may differ. Original emblems can be sourced from dismantlers, but prices are steep. The front bumper lip and rear valance are standard 964 parts, but the Speedster has no rear wiper – the plug is a common missing piece.
Engine and Performance Parts
Cooling System
The 964’s 3.6L air-cooled engine relies on a sophisticated cooling system. The fan, shroud, and oil cooler are identical to the Carrera 2. A common upgrade is to replace the plastic fan with a more efficient aluminum version from an aftermarket brand like RSR. The oil cooler lines are prone to corrosion; use original Porsche lines or high-quality stainless steel reproductions. Be cautious with aftermarket radiators – they often require modification to fit the Speedster’s narrower front end.
Exhaust System
The Speedster came with a standard 964 exhaust, but many owners opt for a sportier sound without sacrificing driveability. Aftermarket headers from Fabspeed or Carnewal are popular, but check local noise regulations. The catalytic converter is the same as on other 964s, but California models may require a specific CARB-compliant unit. Muffler tips are a simple upgrade; ensure the pair you choose matches the cutouts in the rear valance.
Fuel and Ignition
The fuel injection system (DME) is unique to the 964. If you experience rough idle or poor starting, often the culprit is the idle stabilizer valve or the throttle position sensor. These parts are shared with the 964 Carrera 2 and 4, so they are in good supply. Spark plug wires and distributor caps are also standard; use Bosch or Beru for reliability. The fuel pump is located under the car near the rear axle; it is the same part used in later 911s, so sourcing is easy.
Interior and Upholstery
Seats and Belts
The Speedster came with two seats only. The standard seats are manually adjustable (no power) and are identical to those in the coupe, but the seat belt receptacles are mounted to the seat frame rather than the B-pillar. If your seats are worn, consider having them reupholstered rather than buying replacements – correct leather color and stitching is critical. Seat belt webbing and retractors are same as other 964s; use OEM for safety.
Dashboard and Instruments
The dashboard design is the same as all 964s, but the Speedster didn’t have a rear ash tray or rear window switch. The most sought-after interior part is the leather-wrapped steering wheel – a three-spoke airbag wheel unique to the 964. If yours is cracked, it can be rebuilt by specialists like Craft Customs. The instrument cluster is standard, but the speedometer face reads differently in some markets. Replacement bulbs and circuit boards are available.
Carpets and Floor Mats
Original carpet sets are very hard to find. Many suppliers now offer pre-cut wool carpet kits that match the factory color (usually black, silver, or maroon). Avoid cheap synthetic carpets – they don’t fit well. The floor mats are specific to the Speedster because the footwells are narrower due to the soft top mechanism. Custom mats from Cocoa Mat or same supplier can be made to order.
Suspension and Brakes
Shocks and Springs
The 964 Speedster used slightly firmer shocks than the standard Carrera 2. Original Bilstein or Sachs units are still available, but many owners upgrade to adjustable coilovers from companies like KW or Öhlins for better handling. Springs are shared with the coupe; progressive rate springs are a popular mid-cost upgrade. Pay attention to ride height – the Speedster sits a bit lower than most 964s.
Brakes
The braking system is identical to the 964 Carrera 2: four-piston calipers with 298 mm discs. For track use, consider upgrading to 993 Turbo calipers and larger rotors. Brake pads, rotors, and lines are standard items. Be aware that the Speedster’s brake booster is mounted in the same place, so any aftermarket brake kit must clear the soft top frame.
Electrical and Lighting
Headlights and Tail Lights
The 964 uses 5 1/4” Bosch H4 headlights. Clear lenses are a popular upgrade, but original amber lenses are correct. Tail lights are the same as on the coupe, but the Speedster has no rear fog light (unless Canadian market). Wiring looms are generally reliable; if you have electrical gremlins, check the grounds near the battery and under the dash. The convertible top switch and wiring are unique – use a factory wiring diagram for diagnostics.
Fog Lights and Turn Signals
Front fog lights are optional on the Speedster, but the holes in the bumper are pre-stamped. If your car didn’t come with them, aftermarket kits include wiring and relays. Turn signal lenses are the same as on the 964; they tend to fade over time. Replace with Hella for best fit.
Where to Find Parts
Given the rarity of the 964 Speedster, sourcing parts requires a mix of OEM and specialty suppliers. Porsche Classic offers many hard-to-find parts, including the windscreen and specific trim. For body panels, try restoration shops that stock early 911 parts – they often know sources for NOS or used parts. Online forums like Rennlist and Pelican Parts have classifieds where owners sell spares. Independent Porsche specialists often have hidden inventories. Always verify part numbers against the factory parts catalog (PET) before purchasing.
Final Recommendation
Restoring or maintaining a Porsche 964 Speedster is a rewarding but detail-oriented project. For the sake of future value, prioritize originality on exterior trim, interior pieces, and the soft top. For mechanical components, you can safely use aftermarket upgrades that improve reliability and performance without compromising the car’s character. Keep a spreadsheet of part numbers and modifications, and document your work. When in doubt, consult a specialist who knows these models – the investment will pay off in driving pleasure and preservation.
Remember that patience is key. Some parts may take months to locate, but the result is a timeless icon that few others own. Whether you are chasing a concours finish or a lively driver, the right parts make all the difference.