The Porsche 718 Boxster and Cayman are brilliant chassis, but the factory four cylinder turbo exhaust leaves a lot of owners cold. Swapping in a quality aftermarket exhaust transforms how the car sounds, sheds weight over the rear axle, and on the turbo models can free up a little extra flow. The catch is that there is a huge spread in quality, sound character, and how legal each option is for your area, so picking blind is risky.
We pulled together seven of the most respected aftermarket exhaust systems and components that owners actually fit to the 718, covering full valved cat-backs, sport exhausts, and bolt-on resonator and tip upgrades. Each one below is judged on sound quality, build materials, fitment, and whether it suits the flat four or the later flat six 718 Spyder and GT4. Here is how they stack up.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Akrapovic Slip-On Line Titanium Exhaust for Porsche 718 Boxster/Cayman Best Overall Titanium slip-on, valved, carbon tips optional, OEM ECU and valve integration |
9.5 | 🛒 Check Price |
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Fabspeed Supersport X-Pipe Exhaust System for Porsche 718 Best Sound Stainless steel valved cat-back with X-pipe, optional sport catalytic section |
9.3 | 🛒 Check Price |
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Soul Performance Products Valved X-Pipe Exhaust for Porsche 718 Boxster/Cayman Best Tuned Tone T304 stainless valved cat-back, multiple muffler and tip options |
9.2 | 🛒 Check Price |
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Armytrix Valvetronic Cat-Back Exhaust System for Porsche 718 Best Valve Control Stainless valvetronic cat-back with wireless remote and app control |
9.0 | 🛒 Check Price |
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Milltek Sport Cat-Back Valved Exhaust for Porsche 718 Boxster/Cayman Best Value Stainless steel valved cat-back, non-resonated and resonated options |
8.8 | 🛒 Check Price |
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Remus Sport Exhaust with Active Sound Valve for Porsche 718 Best Refined Daily Stainless cat-back with active valve, choice of carbon or steel tips |
8.5 | 🛒 Check Price |
 |
AWE Tuning Touring Edition Exhaust for Porsche 718 Boxster/Cayman Best Drone-Free Stainless cat-back with drone canceling tech, multiple tip finishes |
8.3 | 🛒 Check Price |
1. Akrapovic Slip-On Line Titanium Exhaust for Porsche 718 Boxster/Cayman: Best Overall
Akrapovic is the name most 718 owners land on when they want a no compromise upgrade, and the Slip-On Line earns that reputation. The titanium muffler is dramatically lighter than the cast factory unit, and because it keeps the OEM valve wired into the car, you get a polite tone in normal driving and a genuinely exciting bark when you press the Sport Exhaust button. It is one of the few systems that feels engineered for this specific car rather than adapted from a generic template.
The honest weakness is complexity and the fact that you are paying for a brand as much as the metal. Fitment is more demanding than a simple bolt-on, and many owners hand this one to an independent specialist rather than tackling it on a driveway. The carbon fiber tips that complete the look are often a separate line item too, so budget for the whole package. If you want the best engineered exhaust for the 718 and will not regret going premium, this is it.
- Lightweight titanium construction trims meaningful weight off the rear
- Retains factory exhaust valve control through the Sport button
- Deeper, richer tone without constant drone on the motorway
Pros: Premium titanium build with motorsport pedigree; Plug and play valve and sensor integration; Noticeably better sound across the whole rev range
Cons: One of the more involved fits for a slip-on; Carbon tips are a separate purchase on some listings
2. Fabspeed Supersport X-Pipe Exhaust System for Porsche 718: Best Sound
Fabspeed specializes in Porsche and it shows in the Supersport system for the 718. The X-pipe crossover is the headline feature, letting the two banks share pulses for a fuller, more sonorous note than the factory single path layout. On the flat four turbo cars it adds real drama, and on the flat six Spyder and GT4 it sounds outstanding. It keeps the OEM valves in the loop so you still get a Jekyll and Hyde character on demand.
The flip side of all that volume is that the Fabspeed can be too much for some. Cold starts are loud enough that early morning departures might annoy neighbors, and the turbo four can take on a slightly raspy edge at certain loads that the six never does. If your priority is maximum aural drama and you are not shy about being heard, this is the one to chase. Quieter commuters should look at a more reserved option below.
- X-pipe design balances cylinder banks for a meatier note
- Mandrel bent stainless tubing for smooth flow
- Works with the factory valve actuators and Sport mode
Pros: Aggressive, characterful sound that wakes the flat four up; Strong stainless build with a long warranty reputation; Direct bolt-on with factory valve compatibility
Cons: Louder than some buyers expect at cold start; Sound can edge toward raspy on the four cylinder cars
3. Soul Performance Products Valved X-Pipe Exhaust for Porsche 718 Boxster/Cayman: Best Tuned Tone
Soul Performance has become a favorite among 718 owners who want to fine tune exactly how their car sounds rather than accept one fixed character. The valved X-pipe is offered with different muffler and bypass configurations, so you can lean toward a refined GT cruiser or a loud track weapon. The T304 stainless construction and tidy welds put it on par with the big European names while keeping a distinctly American tuning flavor.
The trade-off is that the Soul system really shines as part of a system rather than alone. To unlock its best note on the turbo four you generally want to pair it with a Soul or compatible sport downpipe, which adds cost and complexity. Lead times can also stretch out, so order ahead of any track season. For owners who treat exhaust selection as a tuning exercise, the flexibility here is hard to beat.
- Choice of muffler bypass levels to dial in your volume
- T304 stainless steel for corrosion resistance and longevity
- Hand built in the USA with strong fitment reputation
Pros: Configurable sound from refined to track aggressive; Excellent welds and fit and finish; Pairs well with downpipe upgrades on the turbo cars
Cons: Lead times can be long during busy periods; Best sound usually needs the matching downpipe added
4. Armytrix Valvetronic Cat-Back Exhaust System for Porsche 718: Best Valve Control
Armytrix takes a different approach to the valve question. Instead of simply piggybacking the factory valve logic, it adds its own electronically controlled valves that you operate from a key fob style remote or a phone app. That means you can shut the car right down for a quiet residential exit, then snap it fully open for a tunnel pull regardless of what drive mode you are in. For owners who love gadgets and control, it is genuinely fun.
The honest caveat is that more electronics means more that can eventually go wrong, and the actuators and wiring are an added layer to maintain over the years. Left fully open the system is also seriously loud, to the point of being antisocial in town. Used sensibly with the app, though, the Armytrix gives the 718 a split personality that few rivals can match, and the tip options let you tailor the look to your taste.
- Electronic valves controllable by remote and smartphone app
- Open or closed at any RPM independent of drive mode
- Multiple tip styles and finishes available
Pros: Total control over volume on the fly; Can be whisper quiet or full open at any time; Eye catching range of tip finishes
Cons: Extra electronics add potential failure points; Fully open can be excessively loud for daily use
5. Milltek Sport Cat-Back Valved Exhaust for Porsche 718 Boxster/Cayman: Best Value
Milltek Sport is the sensible enthusiast pick for the 718, offering a proper valved stainless cat-back that delivers most of the experience of the exotic systems for a far friendlier outlay. The big advantage is choice between resonated and non-resonated versions. The resonated setup keeps long highway stints comfortable, while the non-resonated one turns up the aggression for owners who prioritize noise over refinement. Either fits using the factory hangers and plugs into the OEM valve wiring.
What you give up versus the titanium competition is some of the magic. The Milltek sounds great, but it does not have the metallic shimmer of an Akrapovic, and the non-resonated version can drone at steady cruising speeds that some find tiring. For most owners, though, the resonated Milltek hits a near perfect balance of sound, build quality, and sensible spend, which is why it remains among the most recommended systems for the car.
- Resonated and non-resonated versions to manage drone
- Quality stainless build at a sensible point in the range
- Direct fit using factory hangers and valve wiring
Pros: Strong sound improvement without going extreme; Resonated option keeps motorway driving civilized; Trusted brand with wide availability
Cons: Non-resonated version can drone on long drives; Tone is less exotic than the titanium rivals
6. Remus Sport Exhaust with Active Sound Valve for Porsche 718: Best Refined Daily
Remus has decades of OEM and motorsport experience, and its 718 sport exhaust leans toward refinement rather than shock value. The active valve lets the car stay quiet and composed when you want it to, then open up for a pleasant, deeper note when you push on. For owners who use their Boxster or Cayman as a genuine daily driver or grand tourer, that civilized character is exactly the point, and the broad choice of tip styles lets you finish the rear end nicely.
The honest limitation is that the Remus will not satisfy buyers chasing the loudest, most theatrical sound. It is a gentleman’s upgrade, noticeably better than stock but deliberately restrained, and the airflow gains on the turbo four are modest. If your idea of an exhaust upgrade is a richer voice you can live with every single day rather than a track car bark, the Remus is a very liveable systems on this list.
- Active valve technology for adjustable sound levels
- Refined tone tuned to suit daily and touring use
- Wide selection of tailpipe designs and finishes
Pros: Civilized character that stays comfortable on long trips; Solid European build and finish; Good range of tip options for the look you want
Cons: Less aggressive than enthusiasts may hope; Power gains are modest on the turbo cars
7. AWE Tuning Touring Edition Exhaust for Porsche 718 Boxster/Cayman: Best Drone-Free
AWE Tuning built its reputation on solving the single biggest complaint with aftermarket exhausts, the maddening cabin drone at cruising speed. The Touring Edition for the 718 uses AWE proprietary resonator technology to cancel the specific frequencies that cause that boom, so you get a richer, sportier sound without your ears ringing on a long motorway run. The stainless build and robotic welds are clean and consistent, and the tip choices let you match the look to silver or black accents.
Because the whole philosophy here is liveability, the AWE is not the system to buy if you want to announce your arrival from three streets away. It is meaningfully better than stock but deliberately measured, and buyers expecting a hardcore track soundtrack will find it too subtle. As a do it all upgrade that keeps the cabin civilized while still sounding distinctly Porsche, though, the Touring Edition is one of the smartest picks for high mileage owners.
- Proprietary drone reduction technology for clean cruising
- Stainless construction with precise robotic welds
- Choice of chrome silver and diamond black tip finishes
Pros: Engineered specifically to eliminate cabin drone; Clean, consistent build quality; Great middle ground between stock and loud
Cons: Not as loud or dramatic as valved rivals; Touring tune may feel too subtle for some
Frequently Asked Questions
Will an aftermarket exhaust on my Porsche 718 add real horsepower?
On the turbo flat four 718 models, a cat-back exhaust alone adds only small power gains because the turbocharger and catalytic converters are the main restrictions. The real benefit of a cat-back is weight savings and sound. If you want measurable power, you need to combine the exhaust with a sport downpipe or high flow catalytic section and an ECU tune. On the flat six 718 Spyder and GT4, the naturally aspirated engine responds slightly better to a freer flowing exhaust, but the headline reason owners upgrade across the range is sound and weight rather than big dyno numbers.
Does a 718 aftermarket exhaust keep the factory Sport Exhaust button working?
Most quality valved systems from brands like Akrapovic, Fabspeed, Soul, and Milltek are designed to plug into the factory valve actuators, so your Sport Exhaust button continues to open and close the valves as normal. Systems like Armytrix go further and add their own electronic valves with a separate remote or app, giving you control independent of the drive mode. Always confirm the listing states it retains OEM valve and sensor integration for your specific 718, because a few cheaper systems delete the valve entirely and run loud all the time.
Will a louder exhaust trigger a check engine light on the 718?
A cat-back exhaust that sits behind the catalytic converters generally will not trigger a check engine light, because it does not affect the oxygen sensors the car monitors for emissions. Problems usually appear when you fit high flow or catless downpipes, which can set a P0420 catalyst efficiency code unless the tune accounts for it. To stay code free and keep things simple, choose a quality cat-back from a reputable brand and leave the catalytic section stock, or use a sport cat downpipe paired with a proper tune.
How do I avoid cabin drone with a 718 exhaust upgrade?
Drone is the boomy resonance you hear at steady cruising speeds, and it is the most common regret with aftermarket exhausts. To avoid it, pick a resonated version where the brand offers one, since Milltek and others sell both resonated and non-resonated layouts. Systems engineered specifically against drone, such as the AWE Tuning Touring Edition with its resonator technology, are the safest bet for high mileage and touring owners. Non-resonated and full straight through designs sound great when you are on it but can become tiring on long highway drives.
Can I install a 718 exhaust system myself?
Bolt-on tips, resonator deletes, and some slip-on mufflers can be tackled by a confident home mechanic with a lift or sturdy stands, basic tools, and patience with rusty hardware. Full valved cat-back systems are more involved because of the valve wiring, sensor connections, and tight packaging at the rear of the mid engine 718, so many owners hand these to an independent Porsche specialist. If you do fit it yourself, take your time aligning the tips evenly in the bumper cutouts and double check every hanger and clamp so nothing rattles or leaks.
Our Verdict
For most Porsche 718 owners, the Akrapovic Slip-On Line Titanium is our top pick thanks to its motorsport grade titanium build, smooth factory valve integration, and a sound that genuinely transforms the car without droning. If you want maximum aural drama and Porsche specific engineering, the Fabspeed Supersport X-Pipe is the runner up and arguably sounds even more aggressive, especially on the flat six Spyder and GT4. Buyers who daily their car should look hard at the Milltek for value or the AWE Touring Edition to keep the cabin drone free.
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