The Essential Guide to Porsche RSR Replica Parts

Building a Porsche 911 into an RSR replica is one of the most rewarding ways to honor the brand's racing heritage. Whether you're aiming for a track-ready machine or a show-stopping tribute, the right RSR replica parts are crucial. This guide covers the essential components, what to look for in quality, and how to make smart choices for your build.

Understanding the Porsche RSR Replica Scene

The Porsche 911 RSR was a dominant force in motorsport during the 1970s. Its wide stance, aggressive aerodynamics, and lightweight construction made it a legend. Today, replicas range from faithful restorations to modern interpretations using aftermarket parts. The key is balancing authenticity with practicality.

Why Build an RSR Replica?

• Heritage: You get a car that looks and feels like a race winner without paying seven-figure prices.
• Personalization: Replica parts allow you to tailor the car to your taste—track-focused or street-friendly.
• Community: RSR builds have a strong following, with forums and events dedicated to these cars.

Key Differences Between Genuine and Replica Parts

Genuine Porsche RSR parts are rare and astronomically expensive. Replica parts are more accessible, but quality varies. Plastic or fiberglass panels may not fit perfectly, while metal parts require more skill to install. Always verify the reputation of the manufacturer and ask about material thickness, weave quality (for carbon), and whether the part is designed for street or track use.

Essential Porsche RSR Replica Parts

Building an RSR replica isn't just about a widebody kit. You need a holistic approach covering body, suspension, drivetrain, and interior.

Body Panels and Aero

The most visible parts are the body panels. Classic RSR style includes:

• Front bumper with oil cooler ducts: Often includes a splitter for downforce.
• Wide fenders (front and rear): Usually +60mm to +90mm wider than stock to accommodate race tires.
• Rocker panels and side skirts: Smooth the airflow.
• Ducktail or whale tail spoiler: The iconic rear wing; a ducktail is more subtle, while the whale tail is more aggressive.

Choose between fiberglass (light, affordable, but can crack) and carbon fiber (stiff, lighter, but expensive). For street cars, fiberglass reinforced with Kevlar offers a good compromise.

Suspension and Brakes

A proper RSR replica needs suspension upgrades to handle the extra weight of flared fenders and wider tires.

• Coilover kits: Look for adjustable dampers and ride height. Brands like KW, Bilstein, or custom builds work well.
• Sway bars: Thicker bars reduce body roll; polyurethane bushings help.
• Brake kits: Upgrade to at least 930 or 964 brakes, or a big brake kit with 4-piston calipers. For track use, consider vented rotors and high-temp pads.
• Traction control or limited-slip differential: Not strictly part of the replica aesthetic, but essential if you plan to drive hard.

Engine and Exhaust

While you can keep the stock engine, most replicas aim for more power.

• Induction: Carbureted or EFI upgrades; 3.0L to 3.6L builds are popular.
• Exhaust: A header-back system with a sport muffler gives that flat-six scream. Look for options that mimic the RSR side-exit design.
• Oil cooling: Larger oil coolers are necessary for track days.

Interior and Lighting

To complete the look, interior parts matter.

• Seats: Lightweight racing seats (e.g., Cobra or Recaro replicas) with harnesses.
• Steering wheel: A smaller diameter Momo-style wheel.
• Gauges: Vintage-style instruments or digital dash with classic look.
• Lighting: H4 or HID headlights with classic halos, LED taillights with period-correct design.

Factors to Consider When Choosing Parts

Quality and safety should drive every decision.

Material and Construction Quality

• Fiberglass: E-glass is standard; avoid parts that look resin-heavy or have visible pinholes. S-glass or carbon hybrid is stronger.
• Carbon fiber: Pre-preg carbon is better than wet layups. Check for tight weave and UV protection.
• Metal: Steel or aluminum for brackets and structural parts; ensure proper welding and no sharp edges.

Fitment and Compatibility

Parts designed for specific years (1965-1973 longhood, 1974-1989 impact bumper) have different mounting points. A reputable seller will provide trim/year compatibility and often test-fit panels. If possible, buy from a specialist who knows 911s.

Street vs Track Use

Street cars can sacrifice some stiffness for comfort. Track builds should maximize aero and lightweight parts. Consider your intended use: a street replica might use softer springs and quieter exhaust; a track car can go full race with polycarbonate windows and no sound deadening.

Budget and Value

Replica parts cover a wide range. A complete widebody kit can start around $2,000 for basic fiberglass and go over $10,000 for premium carbon. Suspension and brakes add another $3,000–$5,000. Set a realistic budget and prioritize performance parts that affect safety (brakes, suspension) over cosmetic ones.

Where to Find Quality Porsche RSR Replica Parts

Specialist suppliers and Porsche-focused shops are your best bet. Look for companies that manufacture their own parts (not drop-shippers) and offer fitment guarantees. Online forums like Pelican Parts, Rennlist, and Early 911S Registry have classifieds and recommendations. Many builders start with a donor car and then source panels from known makers like

• Get Parts
• Restoration Design
• Trellcraft
• Mittle Motor Sports

Always ask for pictures of the actual part, not renderings. If possible, visit a shop to see quality in person.

Final Recommendation: How to Build Your RSR Replica Smartly

Start with a solid, rust-free 911 chassis (1970s cars are ideal). Make sure the suspension and brakes are upgraded first—these affect safety the most. Then add the widebody panels; fit them before painting to ensure alignment. Choose your powertrain based on your driving style: a reliable 3.2L Carrera motor is great for street use; a 3.6L with carbs suits track enthusiasts. Finish with interior touches that reflect the RSR race car vibe.

Avoid cheaping out on critical items like brake lines, steering components, and engine mounts. A poorly made part can ruin the experience or cause a failure. And remember, patience yields the best results—many builds take years to perfect. Enjoy the process as much as the final product.