Porsche 718 GT4 / GTS Stainless Steel Valved Catback Exhaust System

Porsche 718 GT4 / GTS Stainless Steel Catback Exhaust System

Engineered to bring out the true character of Porsche’s naturally aspirated 4.0L flat-six, this stainless steel catback system delivers a deeper, sharper, and more engaging driving experience. Refined when cruising, aggressive when pushed—this is how the 718 platform should sound.

Price

$2,799.99

Fitment

• Porsche 718 Cayman GT4 (2020+)
• Porsche 718 Cayman GTS 4.0 (2020+)
• Porsche 718 Boxster GTS 4.0 (2020+)
• Direct bolt-on catback system — no cutting or permanent modifications required
• Precision-engineered for OEM mounting points and factory alignment
• Fully compatible with factory exhaust valve controls and drive modes

Sound Character

The 4.0L flat-six is one of Porsche’s best modern engines—this system lets it breathe and be heard.

• Valves Closed: Deep, refined tone with a smooth, controlled presence. Comfortable for daily driving with minimal drone.
• Valves Open: Aggressive, high-revving flat-six scream with increased volume and sharper top-end. Crisp throttle blips, clean overrun crackles, and a more connected, analog feel.
• Overall Profile: Fuller, louder, and more defined than stock—reducing factory restriction while maintaining a clean, exotic tone with minimal rasp.

Materials & Engineering

• Constructed from premium T304 stainless steel for exceptional durability and corrosion resistance
• Precision TIG-welded for strength and a clean, high-end finish
• Mandrel-bent tubing ensures smooth airflow and optimal exhaust velocity
• Integrated valved design retains full OEM functionality
• Engineered to balance exhaust flow and backpressure for peak performance
• Built to handle high heat from aggressive driving and track use

Performance Benefits

• Improved exhaust flow for increased horsepower and throttle response
• Reduced backpressure for a more free-revving engine
• Enhanced exhaust tone and driver feedback
• Long-term durability with minimal maintenance

What’s in the Box

• Full stainless steel catback exhaust system (mid-pipes + rear section)
• Integrated valved muffler assembly
• All required clamps, hardware, and gaskets
• Plug-and-play valve integration components
• Installation guide

Why This System

The 718 GT4 and GTS 4.0 are built for precision and driver connection—but the factory exhaust leaves untapped potential. This catback system unlocks a deeper, louder, and more emotional sound while improving flow and responsiveness.

For enthusiasts who want their Porsche to deliver a true motorsport-inspired experience every time they start the engine—this is the upgrade that completes the car.