Tools and Materials Needed

Before you begin the installation, gather all necessary tools and the Fabspeed exhaust system. Having everything within reach will streamline the process and prevent unnecessary trips to the toolbox. Here’s a comprehensive list:

  • Fabspeed Exhaust System – Ensure you have the correct model for your specific Porsche Cayman generation (e.g., 987.1, 987.2, 981, 718).
  • Socket Set – Metric sockets from 8mm to 18mm, including deep sockets and extensions.
  • Torque Wrench – A 1/2-inch drive torque wrench capable of readings in the range of 30–70 ft-lbs is ideal.
  • Jack and Jack Stands – A low-profile floor jack and two or four jack stands rated for at least 3 tons each.
  • Safety Goggles and Gloves – Protect your eyes from debris and your hands from sharp edges and hot components.
  • Penetrating Oil – Use a product like WD-40 or Liquid Wrench on rusted bolts.
  • Anti-Seize Compound – Apply to stainless steel bolts to prevent galling and future corrosion.
  • Cutting Tool – A reciprocating saw or angle grinder with a metal-cutting blade may be required if the stock exhaust is seized or you need to cut the factory system for removal.
  • Shop Rags and Safety Mat – Keep your work area clean and cushioned.
  • Oxygen Sensor Socket (optional) – If your Cayman has oxygen sensors in the exhaust path, you may need this tool to avoid damaging the sensors.
  • Helper (recommended) – An extra set of hands makes aligning the exhaust hangers much easier.

Preparation and Safety

Work in a well-ventilated, level area. If you are using a garage, open the door and consider a carbon monoxide alarm when starting the engine later. Wear safety goggles and gloves throughout the process. Disconnect the battery negative terminal to prevent accidental electrical shorts or triggering the vehicle’s security system. Allow the exhaust system to cool completely if the car has been driven recently – the stock exhaust can exceed 400°F and cause severe burns.

Step 1: Lift the Vehicle and Secure It

Position the jack under the car’s designated lift points. On most Porsche Cayman models, these points are reinforced areas near the front and rear jacking points on the chassis. Raise the vehicle high enough to give you comfortable working clearance underneath – typically 18 to 24 inches. Immediately place jack stands under the car’s support points. Never rely solely on the jack; always use stands. Rock the car gently to ensure it is stable before you slide underneath.

Step 2: Remove the Stock Exhaust System

Begin by locating the flanges where the exhaust manifold meets the catalytic converters or primary pipes. On the Cayman, there is usually a set of bolts securing the exhaust system to the headers. Spray penetrating oil on these bolts and let it soak for 5–10 minutes. Use a socket and ratchet to loosen and remove all bolts. Some bolts may be difficult to reach; use extensions and swivel sockets if needed.

Next, support the stock exhaust with a jack or have a helper hold it. The factory exhaust is heavy, typically 45–60 pounds. Remove the rubber hangers using a pry bar or your hands. These hangers are located at multiple points along the exhaust – at the center muffler and near the tips. Once all hangers are released, carefully lower the stock exhaust from the vehicle.

If the exhaust is stubborn due to corrosion or excessive weight, you may need to cut it into sections. Use a reciprocating saw with a bi-metal blade to slice through the pipes at a convenient location (avoid cutting near oxygen sensor bungs or flanges). This is common when the exhaust is one-piece and cannot be removed intact without removing the rear bumper or other components. Fabspeed systems are typically designed to install in sections, so cutting the old exhaust out is acceptable.

Note: On some 981 and 718 Caymans, the rear section of the exhaust is integrated with the rear bumper diffuser removal. Consult the Fabspeed installation instructions specific to your model year to avoid damaging the bumper cover.

Step 3: Inspect and Prepare the Fabspeed Exhaust System

Unbox your new Fabspeed exhaust and lay out all components on a clean, soft surface – cardboard or a moving blanket works well to prevent scratching the polished stainless steel. Verify that you have all parts, including gaskets, bolts, springs, and clamps. Refer to the included hardware list. Check the pipes for any dents, damage, or debris from shipping. If anything is missing or damaged, contact Fabspeed customer support before proceeding.

Apply a thin coat of anti-seize compound to all threaded bolts and nuts that will come into contact with the exhaust system. This is especially important for the manifold-to-cat bolts because stainless steel can bind and gall under heat cycles. Also, install the supplied gaskets onto the flanges, making sure the orientation matches the exhaust flow direction (if applicable).

Step 4: Install the Fabspeed Exhaust System – Section by Section

Begin installation from the front (engine side) moving rearward. This ensures proper alignment and avoids stressing the hangers.

4.1 Install the Primary Pipes / Headers

If your Fabspeed system includes aftermarket headers, bolt these to the engine first. Use the new gaskets provided. Hand-tighten the bolts, then torque to the manufacturer’s specifications – typically 25–35 ft-lbs for the header nuts (check your kit’s instructions). Reuse the factory oxygen sensors by carefully unscrewing them from the old exhaust and installing them into the bungs on the new headers. Apply anti-seize to the sensor threads, but avoid getting it on the sensor tip.

4.2 Install the Center Section (Over-axle Pipes)

Attach the over-axle pipes to the headers or the primary downpipes. Fabspeed uses slip-fit connections with high-temp sealant or band clamps. Slide the pipes together, ensuring a snug fit. Do not fully tighten the clamps yet – leave them loose to allow adjustment. Hang the center section using the existing rubber hangers. You may need to manipulate the exhaust tips or the hanger locations slightly to achieve a gap-free fit. Use a rubber mallet to gently persuade stubborn hangers.

4.3 Install the Muffler / Axle-back Section

Connect the muffler or rear section to the center pipes. Most Fabspeed systems use a band clamp at this junction. Slip the muffler inlet over the over-axle pipe. Reinstall the rear rubber hangers – these may be the same as stock or new ones supplied. Make sure the exhaust tips are centered in the bumper cutouts. Adjust the muffler’s angle by sliding it forward or backward along the slip joint. Once the tips are perfectly aligned, tighten all clamps and bolts to the recommended torque: exhaust band clamps usually 40–50 ft-lbs; flanged connections to 25–35 ft-lbs (check included instructions).

Step 5: Torque All Connections to Specification

Using your torque wrench, go back over every fastener – header nuts, oxygen sensors, exhaust flange bolts, and all clamps. Torque them in a crisscross pattern where applicable to ensure even seating. Pay close attention to spring-loaded nuts (V-band clamps) if present; these require a specific torque to maintain seal without overstressing. Write down the torque values for your records. A leak-free exhaust relies on proper torque.

Step 6: Lower the Vehicle

Double-check that no tools or rags are left underneath. Remove the jack stands one by one, lowering the jack slowly. Let the car settle onto the ground. Reconnect the battery negative terminal if you disconnected it earlier. Turn the ignition to the ON position (engine off) and let the fuel pump prime – no need to start yet. Listen for any clicks or unusual sounds from the exhaust electronics (valves) if your Fabspeed system has active exhaust valves.

Step 7: Test the Exhaust System

Start the engine. The first startup will be louder than expected as the exhaust heats up and the ECU adapts. Let the engine idle for 2–3 minutes. While the car is idling, get underneath (with the engine off and cool if needed) and inspect all joints for smoke or gas leaks. You can use a soapy water spray on the connections – bubbles indicate a leak. Tighten any leaking clamps slightly, but do not overtighten to the point of damaging the pipe.

After confirming there are no major leaks, take the car for a short drive of 5–10 miles. Vary the engine speed and listen for any rattles or contact between the exhaust and the chassis, underbody shields, or suspension components. Fabspeed systems are precision-made, but slight adjustments may be necessary if you hear any metal-on-metal noise. After the drive, let the car cool and retorque the clamps – stainless steel expands and contracts, so a re-torque after a heat cycle is vital.

Step 8: Final Inspection and Tips

Look at the tips – they should be clean and evenly spaced. If they are touching the bumper or seem crooked, loosen the rear clamps and adjust. Check the clearance around the hangers and make sure no rubber hanger is twisted or stressed. Apply a small amount of corrosion inhibitor to exposed metal parts if you live in a winter salt region. Finally, enjoy the deeper, more aggressive exhaust note and the slight performance gains from improved exhaust flow.

Common Issues and Solutions

  • Exhaust drone at highway speeds: Some Fabspeed systems are louder than stock. If drone is excessive, consider adding resonated X-pipes or keeping the valves closed (if equipped). Fabspeed offers optional sound inserts for certain models.
  • Check engine light: Aftermarket exhausts combined with other modifications can trigger O2 sensor codes. A tune from a reputable Porsche tuner (like Cobb or APR) can eliminate these codes and optimize power.
  • Bolts coming loose: Use threadlocker (Remflex or OEM) on header bolts if you experience loosening. Always re-check torque after the first 100 miles.

Benefits of a Fabspeed Exhaust System

Installing a Fabspeed exhaust does more than change the sound. It reduces weight by up to 15–20 pounds compared to the factory system. The mandrel-bent, T304 stainless steel construction improves exhaust gas flow, which can free up 5–10 horsepower on normally aspirated Cayman models and slightly more on turbocharged 718s. The sound profile is sportier without being overly aggressive for daily driving. Additionally, Fabspeed systems are built in the USA and carry a limited lifetime warranty against defects.

For more information about specific fitment and sound clips for your Cayman generation, visit the official Fabspeed Cayman product page. To connect with other Porsche enthusiasts who have performed this installation, check out forums like Rennlist Cayman section or Planet-9 for real-world tips and troubleshooting.

Conclusion

Installing a Fabspeed exhaust system on your Porsche Cayman is a rewarding project that transforms the driving experience. By following these expanded steps, taking your time with alignment, and respecting torque specifications, you will achieve a professional-quality installation. The result is a lighter, freer-breathing exhaust that sounds magnificent and adds a touch of motorsport character to your mid-engine Porsche. Remember to recheck hardware after the first few drives and enjoy the soundtrack of your upgraded Cayman.