Description
Unlock the true character of your Porsche 911 (991.1) with the Yonristic Performance Racing Valved Cat-Back Exhaust System. Designed specifically for Porsche's naturally aspirated 3.4L and 3.8L flat-six engines, this premium exhaust system delivers a dramatic improvement in sound, throttle response, weight reduction, and driving excitement while maintaining everyday usability through advanced electronic valve control.
The factory exhaust prioritizes comfort and global noise regulations, limiting the naturally aspirated flat-six from producing the sharp, motorsport-inspired soundtrack enthusiasts expect. The Yonristic Racing Exhaust replaces the restrictive rear exhaust section with a carefully engineered equal-length cat-back system that improves exhaust flow, reduces backpressure, and enhances the engine's natural breathing characteristics.
At the heart of the system is a true equal-length exhaust architecture, designed to balance exhaust pulse timing from both cylinder banks. This optimized configuration improves scavenging efficiency, sharpens throttle response, and produces the unmistakable high-frequency Porsche flat-six sound with greater clarity and definition throughout the RPM range.
The system features electronically controlled dual exhaust valves operated by an included wireless remote controller. Drivers can instantly switch between a refined touring mode and a full racing soundtrack. With the valves closed, the exhaust remains comfortable for daily driving with minimal cabin drone. Open the valves and the flat-six comes alive with an aggressive, exotic exhaust note, crisp overrun characteristics, and exhilarating high-RPM acoustics.
Every Yonristic exhaust is handcrafted from your choice of AISI 304 stainless steel or Ti-6Al-4V Grade 5 titanium. The stainless steel version offers outstanding corrosion resistance and durability, while the titanium version delivers substantial weight savings and a sharper, more metallic motorsport-inspired tone. All systems are hand TIG-welded, precision assembled, and finished using Yonristic's signature polished and frosted surface treatment.
Completing the system are double-layer performance exhaust tips that perfectly complement the rear styling of the Porsche 991.1 while providing a premium OEM+ appearance.
Designed for straightforward installation, the system bolts directly to the factory header connection using OEM mounting locations without cutting or welding.
Key Features
- Performance valved cat-back exhaust system
- True equal-length exhaust architecture
- Electronically controlled dual exhaust valves
- Wireless remote control included
- Five selectable valve sound levels
- Reduced exhaust backpressure
- Improved throttle response
- Available in AISI 304 Stainless Steel
- Optional Ti-6Al-4V Grade 5 Titanium construction
- Hand TIG-welded fabrication
- Signature Yonristic polished and frosted finish
- Optional thermal heat shield for stainless steel systems
- Double-layer performance exhaust tips
- Direct bolt-on installation
- No cutting or welding required
Vehicle Fitment
Compatible with:
Porsche 911 Carrera (991.1)
2012–2016
Porsche 911 Carrera S (991.1)
2012–2016
Porsche 911 Carrera GTS (991.1)
2015–2016
Porsche 911 Targa 4 (991.1)
2014–2016
Porsche 911 Targa 4S (991.1)
2014–2016
Porsche 911 Targa 4 GTS (991.1)
2015–2016
Exhaust Configuration
- Equal-length cat-back design
- High-flow exhaust routing
- Dual electronically controlled valves
- Factory header connection
- Slip-fit assembly with professional exhaust clamps
Valve Control
Wireless Remote Valve System
- Included remote controller
- Immediate valve response
- Five selectable sound levels
- Quiet touring mode
- Aggressive race mode
- Independent electronic valve operation
Material Options
AISI 304 Stainless Steel
- Excellent corrosion resistance
- Long-term durability
- Rich, refined flat-six sound
- Approximately 20% lighter than the factory exhaust
Ti-6Al-4V Grade 5 Titanium
- Exceptional strength-to-weight ratio
- Approximately 65% lighter than the factory exhaust
- Sharper, higher-frequency exhaust tone
- Premium motorsport appearance
- Superior heat resistance
Estimated Performance Benefits
- Improved exhaust flow
- Reduced backpressure
- Sharper throttle response
- Enhanced engine efficiency
- Stronger mid-range acceleration
- Faster engine response
- Reduced overall vehicle weight
- Increased driver engagement
Manufacturing
- Designed and engineered in-house by Yonristic Performance
- Hand TIG-welded construction
- Precision fitment
- Professional slip-fit connections
- Signature polished and frosted surface finish
- Individually quality inspected
Optional Thermal Protection
Available for stainless steel systems:
- Integrated thermal heat shielding
- Improved durability
- Reduced radiant heat
- Additional protection for surrounding components
Installation
- 100% bolt-on installation
- Factory header compatibility
- Uses OEM mounting points
- No cutting required
- No welding required
- Professional installation recommended
Sound Characteristics
Valves Closed
- Refined touring sound
- Comfortable daily driving
- Minimal cabin drone
- Smooth naturally aspirated tone
Valves Open
- Deep, aggressive flat-six exhaust note
- Crisp throttle response
- Exotic naturally aspirated sound
- Enhanced overrun characteristics
- High-RPM motorsport-inspired scream
Why Choose the Yonristic Porsche 991.1 Racing Exhaust?
The Yonristic Porsche 911 (991.1) Racing Valved Cat-Back Exhaust System is engineered for drivers seeking the perfect combination of lightweight performance, premium craftsmanship, and complete sound control. Featuring equal-length exhaust routing, wireless electronic valve control, premium stainless steel or Grade 5 titanium construction, and precision hand-built manufacturing, it transforms the Porsche 991.1 into a more responsive, engaging, and emotionally rewarding sports car while preserving excellent everyday drivability.
