JCR Inconel Race Exhaust Manifolds for 981 Porsche Boxster Spyder / Cayman GT4

JCR Inconel Race Exhaust Manifolds for 981 Porsche Boxster Spyder / Cayman GT4

The JCR Inconel Race Exhaust Manifolds for the 981 Porsche Boxster Spyder and Cayman GT4 is designed to unlock even more of the iconic sound and performance from these already incredible machines. Known for their soulful, aggressive exhaust note straight from the factory, the 981 GT4 and Spyder models now have the opportunity to reach their full potential. Crafted from high-performance Inconel, a heat-resistant alloy used in motorsport, these manifolds replace the stock units, reducing weight by over 6.5kg (14.4lbs) while significantly improving throttle response. The result is a noticeable boost in power — approximately 28whp and 27wtq — along with a more pronounced, thrilling exhaust note that perfectly complements the driving experience. With a direct replacement design, installation is straightforward, requiring no additional modifications. For Porsche enthusiasts looking to enhance both performance and sound, these Inconel Race Exhaust Manifolds are the perfect upgrade.

Direct Replacement / Modular Fitment

• The JCR Inconel Race Manifolds are a complete direct replacement for the OEM 981 GT4 and Spyder manifold assembly. No fabrication or additional parts are needed — simply remove the factory exhaust manifolds and install the JCR Inconel Race Manifolds.

Light Weight

• Crafted from 100% Inconel, the JCR Inconel Race Manifolds offer a significant weight reduction compared to the factory exhaust setup, making this upgrade a true win-win modification.

Power Increase

• Each component in the JCR exhaust line is engineered to enhance horsepower and torque, with results varying based on the specific combination of parts. By optimizing the primaries and collector design, JCR not only delivers a race-inspired, aggressive exhaust note but also dramatically improves exhaust flow, resulting in increased horsepower and torque.

Features

• 100% inconel construction
• Direct replacement for OEM manifolds
• 6.52kg (14.37lbs) weight reduction vs OEM
• Improved sound quality
• Sold as a pair

Power Specifications

• Horsepower:
  • OEM: 370-380hp
  • JCR: +32.34hp (+28.12whp)
• Torque:
  • OEM: 310ft-lbs
  • JCR: +30.95ft-lbs (+26.91ft-lbs to the wheels)

Applications

• Porsche Boxster Spyder: 981 (2015-2016) [3.8L F6 MA1.24]
• Porsche Cayman GT4: 981 (2015-2016) [3.8L F6 MA1.24]

More JCR Exhaust Products for 981 Boxster / Cayman

• Titanium Exhaust Tip Kit
• Titanium Silenced Exhaust Tip Assembly
• Titanium Megaphone Exhaust Tip Assembly
• Titanium Silenced Exhaust Tips
• Titanium Megaphone Exhaust Tips

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.