Porsche 981 Cayman / Boxster Performance Cat-Back Exhaust System
(Cayman / Boxster / Cayman S / Boxster S / GTS)
Unlock the true character of the Porsche 981 with a completely redesigned exhaust system engineered to maximize flow, sharpen throttle response, and unleash the flat-six soundtrack the factory system hides. The OEM exhaust on the 981 is heavily baffled to meet comfort and noise regulations—resulting in a muted, restricted tone that fails to showcase the engine’s natural resonance. Our system transforms the car into the raw, motorsport-inspired machine it was meant to be.
At the heart of this design is a dual-loop architecture constructed from 2.5-inch (63mm) mandrel-bent tubing, engineered to amplify exhaust pulse length while smoothing out the frequency balance. The loops deepen the midrange growl while sharpening the top-end scream, creating a uniquely exotic tone that no conventional system can reproduce. Exhaust flow then merges through our hand-built X-pipe exit, which equalizes bank pressures and blends pulses into a clean, razor-sharp flat-six wail.
This is a pure, valveless straight-through system—built for drivers seeking the full acoustic and performance potential of the 981 platform. Without internal restrictions or valve bottlenecks, the engine breathes freely, improving responsiveness and supporting additional tuning, high-flow headers, or upgraded intakes. During installation, simply sealing the factory vacuum valve lines ensures a proper ECU response and prevents any CEL issues.
Every system is hand-welded, hand-built, and available in either AISI 304 stainless steel or 6AL-4V aerospace-grade titanium for maximum weight savings and a more vivid, higher-frequency tone. The setup finishes with aggressive 3.5-inch exhaust tips, available in polished chrome, satin black, burnt, or forged carbon fiber to match your vehicle’s aesthetic.
Completely bolt-on with no cutting or welding required, this exhaust offers the perfect balance of craftsmanship, sound, and performance for any 981 enthusiast looking to elevate their driving experience.
Experience Unmatched Performance with the 981 Cayman Performance Exhaust
Fitment:
Porsche 981 Cayman / Boxster / Cayman S / Boxster S / GTS (2013–2016)
Configuration:
Dual-loop cat-back system
2.5" (63mm) mandrel-bent tubing
Merged X-pipe exit
No valves — straight-through performance design
Materials:
AISI 304 Stainless Steel
6AL-4V Titanium (55–60% lighter than OEM)
Manufacturing:
Full 3D-scanned fitment
TIG-welded by hand
Precision-formed loops and X-pipe
Show-grade finish
Tip Options (3.5” diameter):
Chrome / Burnt / Satin Black / Forged Carbon Fiber
Performance Gains:
+8–12 hp & +10–14 lb-ft (cat-back only)
+18–25 hp with high-flow headers (estimated based on 981 tuning data)
Improved throttle response & faster revving
More efficient exhaust scavenging due to X-pipe merge
Weight Savings:
304 Stainless: ~5–8 lbs lighter than OEM
Titanium: ~15–20 lbs lighter than OEM
Installation:
100% bolt-on; no cutting or welding needed
Recommendation: cap/seal OEM vacuum valve lines to avoid CEL
Direct fit with OEM mounting points
Enhance Power and Efficiency
The Yonristic Porsche 981 Cayman performance exhaust is engineered to optimize your vehicle's horsepower and torque output. Designed specifically for the 981 Cayman and Boxster models, this cat-back exhaust system uses high-quality stainless steel materials to reduce weight and improve exhaust flow. By decreasing backpressure, the system enhances engine efficiency, resulting in noticeable power gains and improved throttle response. Whether on the street or the track, drivers will experience a more dynamic and aggressive driving sensation without sacrificing reliability or daily usability.
Signature Sound Quality
This performance exhaust system delivers a deep, aggressive tone that perfectly complements the natural character of the Porsche 981 Cayman engine. Carefully crafted acoustic tuning ensures the exhaust emits an exhilarating yet refined sound, avoiding annoying drone during highway cruising. Installation of the Yonristic cat-back exhaust allows enthusiasts to enjoy a pronounced exhaust note that enhances the driving experience, signaling performance gains while preserving a comfortable ride. This distinct sound signature truly makes your 981 Cayman stand out.
Precision Fit and Durable Construction
Designed as a direct bolt-on replacement, the Yonristic 981 Cayman performance exhaust guarantees an exact fit for Porsche 981 Cayman and Boxster models. The system features mandrel-bent piping for smooth airflow, resistant to corrosion thanks to its 304-grade stainless steel construction. This ensures longevity and durability in all weather conditions. The exhaust tips offer a sleek, polished finish that enhances your vehicle’s aesthetic appeal. With straightforward installation, the system is perfect for enthusiasts looking for a professional upgrade without modifications.
