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.

Key Specifications

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