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Introduction: Unlocking the True Character of Your 718 Cayman
The Porsche 718 Cayman is already a precision instrument, but for many enthusiasts, the factory exhaust leaves room for improvement. The Fabspeed Sport Exhaust system is engineered to deliver a richer, more aggressive sound while also providing a measurable increase in performance. This comprehensive guide covers everything you need to know about the installation process, the real-world benefits, and how to get the most out of your upgrade. Whether you’re a seasoned DIY mechanic or a first-time installer, the steps here will help you achieve a professional-quality result.
Why Choose the Fabspeed Sport Exhaust for the 718 Cayman?
Fabspeed has built a reputation for producing high-performance exhaust systems that combine advanced engineering with a driver-focused soundtrack. The Sport Exhaust for the 718 Cayman is no exception. Here’s what sets it apart from the stock system and other aftermarket options.
Sound Quality and Tuning
The factory exhaust on the 718 Cayman is designed to meet global noise regulations, which often means a muted, distant engine note. The Fabspeed system transforms that experience. Owners consistently report a deeper, more aggressive tone at idle and under load, with a pronounced rasp at high RPM that pays homage to Porsche’s flat-four heritage. The system is engineered to eliminate unwanted drone while preserving a clean, refined note during cruising. This balance makes it suitable for daily driving as well as spirited canyon runs.
Performance Gains: More Than Just Sound
Beyond the auditory upgrade, Fabspeed claims a peak power gain of up to 10 horsepower at the wheels when paired with a proper tune. The increase comes from reduced backpressure and improved exhaust flow, which allows the turbocharged flat-four to breathe more freely. Even without a tune, many drivers notice sharper throttle response and a slightly quicker spool. For maximum benefit, pairing the exhaust with a custom ECU tune can unlock additional gains and optimize air-fuel ratios for the new flow characteristics.
Weight Reduction
The Fabspeed Sport Exhaust is constructed from lightweight T304 stainless steel with a polished finish. Compared to the factory system, which includes heavy resonators and thick muffler casings, the aftermarket unit saves approximately 12–15 lbs. This reduction contributes to improved acceleration and handling, especially when combined with other lightweight modifications.
Material Quality and Warranty
Fabspeed uses only high-grade T304 stainless steel for its corrosion resistance and longevity. The mandrel-bent tubing ensures smooth flow without restrictions. The system is also TIG-welded for strength and appearance. Fabspeed backs their products with a limited lifetime warranty against defects in material and workmanship. This gives you added confidence that the investment will last the life of the vehicle.
Tools and Preparation for the Installation
Before you begin, gather the following tools and supplies. Having everything ready will make the process smoother and safer.
- Socket set (metric, 10mm, 13mm, 18mm, etc.)
- Torque wrench (capable of 30–50 ft-lbs)
- Ratchet with extensions
- Jack and jack stands (or a lift)
- Flathead screwdriver (for prying exhaust hangers)
- Penetrating oil (e.g., WD-40 or PB Blaster)
- Cutting tool (angle grinder or reciprocating saw) – if dealing with seized bolts
- Safety goggles and gloves
- Shop rags
- Optional: Exhaust hanger removal tool (pliers)
Step-by-Step Installation Guide
Step 1: Prepare the Vehicle
Park the car on a level concrete surface. Allow the exhaust to cool completely if the engine has been running. Wear safety goggles and gloves. Raise the rear of the vehicle using a jack and secure it with jack stands placed on the factory lift points. Never work under a car supported only by a jack. For added safety, chock the front wheels.
Step 2: Access and Remove the Factory Exhaust
Begin by spraying penetrating oil on all exhaust bolts and hanger connections. Let it soak for 5–10 minutes.
- Using a 13mm socket, remove the bolts connecting the exhaust to the catalytic converters (or downpipe flanges). There are typically two flanges, each with 2 bolts.
- Unbolt the hanger brackets near the rear axle and at the muffler section. The factory system uses rubber isolators. You can pry them off with a flathead screwdriver or use a dedicated hanger removal tool.
- If the exhaust is one piece (which is common on the 718 Cayman), you may need to cut it to remove it. Many aftermarket systems are designed to be installed without cutting, but the factory exhaust is often too long to remove without disassembly. Check your specific model year: some 718s have a two-piece factory exhaust. If it’s one piece, use a cutting tool to cut just ahead of the rear axle crossmember. This makes removal easy and does not affect the Fabspeed installation because the new system uses a two-piece design.
- Carefully lower the factory exhaust. It’s heavy, so have a helper or a support stand. Remove the old gaskets from the flanges.
Step 3: Install the Fabspeed Sport Exhaust
Installation is essentially the reverse of removal, but with attention to proper alignment and torque.
- Place the new gaskets (often provided with the Fabspeed system) onto the catalytic converter flanges. Use a thin layer of anti-seize compound on the manifold bolts to prevent future seizing.
- Attach the front section of the Fabspeed exhaust (the part that connects to the converters) using the supplied bolts. Hand-tighten the bolts, then torque to the manufacturer’s specification (typically 35–40 ft-lbs). Do not fully tighten yet if the system requires adjustment.
- Install the rear section (muffler and tips). Loosely fit all hanger brackets into the rubber isolators. The system should hang without stress. Adjust the exhaust tips so they are centered in the bumper cutouts.
- Once everything is aligned, tighten all clamps and flange bolts to torque spec using a torque wrench. Double-check all connections for tightness.
- Reconnect any oxygen sensor wiring if the installation required unplugging them (usually not necessary for the axle-back portion).
Step 4: Final Checks and Lowering the Vehicle
Start the engine and listen for any exhaust leaks at the flanges. If you hear a ticking sound, the gasket may not be seated correctly. Tighten the bolts if needed. Check that the exhaust does not contact any suspension components or underbody panels. If everything is clear, lower the vehicle and re-torque the lug nuts to spec (recommended 118 ft-lbs for the 718 Cayman).
Post-Installation: Break-In and Sound Evolution
The Fabspeed Sport Exhaust will sound louder initially, but the tone will evolve over the first few hundred miles as the packing material settles and carbon deposits form. Here’s what to expect.
- First 50 miles: The exhaust may seem slightly harsh or tinny. This is normal.
- 100–300 miles: The note deepens and becomes more refined. Some drone may be present at certain RPMs, but it usually diminishes as the system conditions.
- 500+ miles: The final sound profile is established. Most owners report a satisfying growl with no unpleasant drone.
During break-in, avoid sustained high-RPM runs (above 5,000 RPM) for the first 100 miles. Instead, vary the RPM to help the system settle evenly.
Performance Testing and Tuning Considerations
The 10 hp gain advertised by Fabspeed is achievable on a properly maintained car with the right supporting modifications. For the best results, consider these points.
Dyno Results: Real-World Gains
Independent dyno tests on a 2017 718 Cayman S (2.5L turbo) showed a peak gain of 9.2 hp and 11 lb-ft of torque at the wheels with the Fabspeed exhaust alone. Adding a high-flow downpipe and a tune pushed those numbers to 22 hp and 18 lb-ft. The exhaust alone provides a noticeable improvement in throttle response and a more linear power delivery.
Pairing with an ECU Tune
Many Fabspeed owners choose to upgrade the engine calibration to maximize the exhaust’s potential. Popular tuning options for the 718 include Cobb Accessport with a custom tune or a flash tune from a reputable shop. The tune adjusts fuel mapping and boost targets to take advantage of the reduced backpressure. This combination is safe for daily driving and can produce reliable gains.
Emissions and Warranty Considerations
The Fabspeed Sport Exhaust is a cat-back system, meaning it does not replace the catalytic converters. Therefore, it is legal for road use in most states and will not trigger a check engine light. However, some states (like California) have noise restrictions. Check your local laws before installation. The exhaust does not affect the new vehicle warranty under the Magnuson-Moss Act, but your dealer may deny warranty claims if they can prove the modification caused a problem. For peace of mind, keep your original exhaust to reinstall if needed.
Common Installation Tips and Troubleshooting
- Seized bolts: On older 718s (2017–2019), exhaust bolts can rust. Apply penetrating oil and use a six-point socket to avoid rounding. If a bolt snaps, drill it out and use a stainless-steel replacement.
- Hanger alignment: The aftermarket hangers sometimes require slight bending with pliers to fit perfectly. Be gentle to avoid cracking the rubber isolators.
- Exhaust drone: If you experience excessive drone between 2,000–2,500 RPM, check that all clamps are tight. A loose joint can cause vibration. Some owners install a resonance tube or a Helmholtz-style resonator to cancel specific frequencies.
- Tips sticking out: Adjust the tips by loosening the clamp and sliding them in or out. Aim for a 0.5–1 inch protrusion from the bumper.
Comparison with Other Aftermarket Exhausts
The 718 Cayman aftermarket is saturated with options. Here’s how the Fabspeed Sport Exhaust stacks up against two popular competitors.
| Feature | Fabspeed | Soul Performance | Akrapovic |
|---|---|---|---|
| Price | $1,495 | $1,695 | $2,295 |
| Material | T304 stainless steel | T304 stainless steel | Titanium |
| Power Gain (claims) | Up to 10 hp | 8–12 hp | 7–10 hp |
| Weight Savings | 12–15 lbs | 10–14 lbs | 18–22 lbs |
| Sound Character | Deep, aggressive, slight rasp at high RPM | Refined, European tone, minimal drone | Exotic, high-pitch, very light |
| Warranty | Lifetime | 2 years | 3 years |
Fabspeed offers the best value for those seeking a dramatic sound improvement with a lifetime warranty. Soul Performance is slightly more expensive but offers a more refined note. Akrapovic is the lightweight champion but at a premium price.
Long-Term Ownership and Maintenance
The Fabspeed exhaust requires minimal upkeep beyond the occasional inspection. Because it’s stainless steel, it will resist rust, but road salt and chemicals can dull the finish. Use a stainless steel cleaner and non-abrasive sponge to keep the tips polished. Periodically check the hanger rubbers for cracks or sagging, especially if you drive in harsh climates. The exhaust tips may develop heat discoloration (a blue/purple tint) over time, which is normal for high-performance systems. Some owners prefer this patina; others use metal polish to restore the original shine.
Final Thoughts
Installing the Fabspeed Sport Exhaust on a 718 Cayman is one of the most rewarding modifications you can make. The process is straightforward for any experienced DIYer, and the end result is a car that sounds as thrilling as it performs. The 10-hp gain is a nice bonus, but the real delight comes from the visceral connection you feel every time you press the throttle. With proper installation and a little patience during the break-in period, you’ll enjoy a transformed driving experience that lets the character of Porsche’s flat-four truly sing.
For more details about the specific system for your model year, visit the Fabspeed official page. You can also check Rennlist forums for owner reviews and installation threads, or see a video installation guide on YouTube to visualize the process before you start.