The Ultimate Guide to CSP Parts for Porsche: Quality, Options, and Buying Tips

If you own a classic Porsche—especially an air-cooled model like the 911, 912, or 356—you've probably come across the name CSP. CSP (short for Competition Sports Parts) is a German manufacturer known for producing high-quality aftermarket and restoration parts that often exceed OEM standards. This guide covers everything you need to know about CSP parts for Porsche: what they are, which components are available, how they compare to original parts and other aftermarket brands, and practical advice for purchasing them. Whether you're restoring a 356 to concours condition or upgrading a 911 for weekend track days, CSP offers a range of parts that combine engineering precision with period-correct aesthetics.

What Are CSP Porsche Parts?

CSP (C.S.P. GmbH) is a German company based in the Eifel region, specializing in Porsche restoration and performance parts since the 1980s. They are particularly renowned for their suspension components, brake upgrades, and interior fittings for early 911, 912, 356, and 914 models. Unlike generic aftermarket parts, CSP designs its components with a deep understanding of Porsche engineering, often improving upon original designs where they were weak or outdated. For example, CSP's rear torsion bar adjusters are a popular upgrade because they allow easy ride height adjustment without disassembling the suspension—something the factory setup made cumbersome.

CSP parts are made in Germany (and some in other European countries) using modern manufacturing techniques like CNC machining, but they maintain the original look and feel of classic Porsches. This makes them especially valuable for owners who want improved performance or reliability without sacrificing originality. CSP is also a go-to source for rare or discontinued parts that Porsche no longer supplies, making them essential for full restorations.

Types of CSP Parts for Porsche

CSP offers a broad catalog spanning chassis, drivetrain, engine, interior, and exterior components. Below are the main categories.

Suspension and Chassis Components

CSP is most famous for its suspension upgrades. They produce complete coilover kits, adjustable spring plates, adjustable shock absorbers, and sway bars. The CSP adjustable rear torsion bar system is a benchmark product: it replaces the factory fixed spring plate with a unit that can be adjusted in seconds via a threaded collar. This is a godsend for drivers who fine-tune their suspension for different tracks or road conditions.

• Coilover Kits: CSP coilovers for early 911 models provide a lower ride height and improved damping. They are rebuildable, a sign of quality. Expect to pay $2,000–$4,000 depending on the model.
• Sway Bars: CSP offers front and rear sway bars with multiple adjustment holes. Their design incorporates spherical bearing end links for precise articulation.
• Bushings: Polyurethane or rubber bushings for control arms, spring plates, and sway bar mounts—all made to tight tolerances.

Engine and Drivetrain Parts

CSP produces performance engine parts such as oil pumps, chain tensioners, gasket sets, and carburetor kits. They are known for their solid-type chain tensioners, which eliminate the failure-prone hydraulic tensioners used on early 911 engines. They also offer lightweight flywheels and performance clutch kits for the 915 transmission.

• Oil Pumps: CSP's high-volume oil pumps draw from racing experience and improve oil flow to protect your engine.
• Fuel System: Carburetor rebuild kits for Weber and Solex carbs, plus throttle linkage upgrades.
• Cooling: For air-cooled engines, CSP offers polished fan shrouds and belt-driven systems.

Interior and Trim

CSP reproduces a wide range of interior components that are often unobtainable from Porsche. This includes door panels, dashboard pads, carpet sets, and headliners—all made to original specifications. They also produce sport seats, steering wheels, and pedal assemblies for a more driver-focused cockpit.

• Pedal Assemblies: CSP pedal clusters for early 911s feature a more ergonomic layout and feel more direct than the originals.
• Dash Components: Blanking plates, gauge holders, and custom wood accents.

Brakes and Wheels

CSP offers brake calipers, rotors, lines, and master cylinders. Their brake systems often use Porsche Big Red calipers or similar multi-piston setups that can be adapted to fit under original steel wheels. They also sell reproduction steel wheels (Fuchs-style) and wheel adapters.

CSP vs. OEM vs. Other Aftermarket Brands

When deciding between CSP, OEM Porsche parts, and other aftermarket suppliers (like Elephant Racing, Pelican Parts, or Sway-A-Way), consider the following:

• Quality: CSP parts are generally considered equal or superior to OEM in terms of material and fitment. Many owners report that CSP suspension parts fit without adjustment, which is not always true for cheaper alternatives.
• Price: CSP is not cheap. Their parts are priced at a premium compared to standard aftermarket, but often less than rare and discontinued OEM NOS parts. For example, a pair of OEM rear torsion bar adjusters (if you can find them) might cost more than CSP's new version, which is also better designed.
• Availability: CSP parts are in production, so you can order them new rather than hunting for used original parts. This is a major advantage for restorations.
• Car Enthusiast Reputation: Among Porsche air-cooled enthusiasts, CSP is a respected brand. They sponsor historic racing and are known to supply parts for top-level restorations.

How to Buy CSP Parts for Your Porsche

The best way to buy CSP parts is through specialized Porsche parts retailers. CSP does not sell directly to the public (with some exceptions at trade shows). Here are practical tips:

1. Identify Your Exact Porsche Model and Year: CSP parts are often specific to narrow ranges—e.g., 1965–1968 911, 1969–1973, etc. Check CSP's catalog or contact a dealer.
2. Check Compatibility: Some CSP parts may require additional modifications. For instance, their coilovers may need different spring rates depending on your engine weight. Ask a knowledgeable vendor.
3. Purchase from Reputable Dealers: Look for retailers that specialize in Porsche parts, like Stoddard, Pelican Parts, or Ebsco (for CSP specifically). They can confirm fitment and handle warranties.
4. Consider a Full Conversion Kit: For suspension, CSP offers complete packages that include everything needed. This simplifies ordering and ensures compatibility.
5. Factor in Installation: Some CSP parts (like the adjustable spring plates) are straightforward for a competent mechanic; others (like coilovers) may require professional alignment and corner balancing.

Final Recommendation

If you own an air-cooled Porsche and need replacement or upgrade parts, CSP is an excellent choice. Their components are engineered to improve on the original without sacrificing the character of the car. For owners who prioritize quality and want direct bolt-on solutions, CSP is often the best option available. However, if you are on a tight budget, other aftermarket brands may offer lower-cost alternatives, but be prepared for potential fitment issues. For really rare parts, CSP may be your only source for new items. Inspect your car's condition and driving goals: a weekend cruiser will benefit from CSP's suspension bushings and brake lines, while a track car will appreciate a full coilover setup. Always consult with a Porsche specialist before ordering to confirm part numbers and availability. With CSP, you get German engineering that honors Porsche's heritage—so you can drive your classic with confidence and performance.