JCR Non-Valved Superlight Race Exhaust System & Manifold Assembly for 991.2 Porsche 911 GT3 RS (with OPF) / Speedster

JCR Non-Valved Superlight Race Exhaust System & Manifold Assembly for 991.2 Porsche 911 GT3 RS (with OPF) / Speedster

The JCR Non-Valved Superlight Race Exhaust System & Manifold Assembly for the 991.2 Porsche 911 GT3 RS (with OPF) / Speedster is engineered for maximum performance, weight reduction, and an uncompromising race-inspired sound. Available in four configurations — Silenced Center Section & Silenced Side Pipes, Silenced Center Section & Non-Silenced Side Pipes, Non-Silenced Center Section & Silenced Side Pipes, and Non-Silenced Center Section & Non-Silenced Side Pipes — this system allows drivers to tailor sound levels and characteristics to their preference. All versions can be paired with optional exhaust tips in Titanium Straight, Titanium Megaphone, Titanium Superlight Megaphone, or Inconel Rolled styles, with finish options including Polished (inconel), Raw (titanium), or Black Coated, while also maintaining compatibility with OEM tips. Designed as a direct replacement for the factory system, the JCR Superlight Race Exhaust delivers enhanced flow, reduced rear-axle mass, and a sharper, more engaging driving experience on both road and track.

Light Weight

• JCR, through the use of lightweight materials and innovative design, has significantly reduced the overall weight of the factory 991 GT3 RS (OPF) & Speedster exhaust components. Reducing weight in any performance vehicle delivers notable benefits; however, on this platform, the effects are amplified. By lessening the rear-biased weight distribution, overall balance and handling are improved. JCR’s most extreme exhaust solution for this platform removes over 21kg from behind the rear axle, delivering tangible performance advantages on its own.

Direct Replacement

• All JCR 991 GT3 RS (OPF) & Speedster Superlight Race Exhaust Systems are 100% direct replacements for the OEM exhaust system. No additional work is required during installation beyond removing the OEM component and fitting the JCR equivalent with the supplied hardware.

Center Section Versions

• Silenced: The JCR Silenced version of the center section offers substantial sound suppression compared to the Non-Silenced variant, achieving a 5dB reduction in volume during full-throttle drive-by noise testing. All JCR Superlight Race Exhaust Systems incorporate a tuned merge for improved exhaust scavenging and a smoother, more refined tone.
• Non-Silenced: The JCR Non-Silenced version of the center section provides the greatest weight reduction and the highest overall sound levels. This system is best suited for those seeking an aggressive exhaust note and planning to drive on circuits without noise restrictions. All JCR Superlight Race Exhaust Systems incorporate a tuned merge for improved exhaust scavenging and a smoother, more refined tone.

Valve Delete

• The JCR Titanium Non-Silenced and Silenced options remove the factory valve-switching function for a purer driving experience and maximum exhaust flow. All 991 GT3 RS (OPF) & Speedster models utilize electronic valve control, which, if removed without consideration, can cause poor running and check engine lights. To prevent this, all Non-Valved JCR Superlight Race Exhaust Systems include the JCR Valve Delete Kit, ensuring the car operates flawlessly as per OEM specifications.

Side Silencer Versions

• Silenced: The JCR Inconel Race Side Silencers replace the restrictive factory assembly with a high-flow HJS 200-cell silencer, greatly improving exhaust flow and performance. For vehicles without OPF monitoring, these Race Silencers typically avoid triggering a check engine light and do not require tuning, though in certain cases a CEL may still occur due to factors such as poor fuel quality or heavy load before the system reaches full operating temperature. As such, JCR does not guarantee the absence of CELs when using these parts.
• Non-Silenced: The JCR Titanium Side Silencers completely remove the restrictive factory assembly for maximum performance and sound.

RSR Sound

• At higher RPMs, the JCR Superlight Race Exhaust System delivers the distinctive “RSR” sound that is highly sought after.

Testing Procedure

• As with all JCR products, extensive testing is conducted before release. Development of this particular product began in 2021.

Power Increase & Real World Performance Improvements

• Every component in the JCR Exhaust line is engineered to improve horsepower and torque, with gains dependent on the specific combination of parts. The JCR Superlight Race Exhaust Systems can deliver up to 26hp and 36tq, along with enhanced engine response and midrange performance. By optimizing the manifold design and removing the highly restrictive factory assembly, the system not only produces an aggressive race-inspired tone but also significantly improves exhaust flow. This results in increased power and torque while greatly reducing operating temperatures under hard driving. Testing has shown that OPF-equipped naturally aspirated vehicles can lose substantial power during extended runs due to excessive heat buildup. With the JCR system, performance remains consistent, with even greater gains achieved during long track sessions compared to the OEM exhaust system.

Features

• Non-valved system
• Inconel race exhaust manifolds
• Titanium center section (silenced or non-silenced)
• Inconel 625 HJS 200-cell race side silencers (silenced version)
• Titanium race side silencers (non-silenced version)
• Valve Delete Kit included
• Improved sound quality
• Compatible with OEM tips
• Multiple options for exhaust tips:
  • Titanium Straight (raw or black coated)
  • Titanium Megaphone (raw or black coated)
  • Titanium Superlight Megaphone (raw or black coated)
  • Inconel Rolled (polished or black coated)

Specifications

• Weight Saving vs OEM:
  • Silenced Center Section & Silenced Side Pipes Version: 16.41kg
  • Silenced Center Section & Non-Silenced Side Pipes Version: 19.89kg
  • Non-Silenced Center Section & Silenced Side Pipes Version: 18.09kg
  • Non-Silenced Center Section & Non-Silenced Side Pipes Version: 21.57kg
• Horsepower Gain vs OEM: 26hp
• Torque Gain vs OEM: 36tq

Applications

• Porsche 911 GT3 RS: 991.2 (2018-2019) [4.0L F6]
• Porsche 911 Speedster: 991.2 (2019) [4.0L F6]

More JCR Exhaust Products for 991 GT3 RS with OPF and Speedster

• Titanium Valved Race Exhaust System
• Titanium Non-Valved Race Exhaust System
• Inconel Race Exhaust Manifolds (991.2 / 992 GT3, GT3 RS with OPF, GT3 Touring, S/T, and Speedster)
• Exhaust Valve Delete Kit (991.2 / 992 GT3, GT3 RS with OPF, GT3 Touring, and Speedster)
• Titanium OEM-Replacement Megaphone Exhaust Tips
• Titanium OEM-Replacement Straight Exhaust Tips
• Valved Superlight Race Exhaust System & Manifold Assembly

Notes

• EU specification cars with OPF monitoring may require an ECU tune to avoid CEL
• Compatible with 991.2 GT3 RS models equipped with OPF

About JCR Developments

JCR Developments is an engineering-led performance brand specializing in high-end exhaust and motorsport-derived upgrade solutions for marquee supercars and enthusiast platforms. Known for its expertise in advanced materials such as Inconel and lightweight stainless alloys, JCR focuses on reducing mass, improving thermal efficiency, and unlocking authentic, emotionally engaging sound without compromising drivability or OEM systems integration. Each component is designed through data-driven development, track-informed testing, and precision fabrication, resulting in products that deliver measurable performance gains alongside elevated craftsmanship. Serving discerning drivers, collectors, and professional build shops worldwide, JCR Developments combines technical rigor with boutique-level customer support to enhance the character, capability, and long-term enjoyment of iconic vehicles.