JCR Inconel Race Exhaust Manifolds for 982 Porsche 718 Boxster GTS 4.0 and Spyder / 718 Cayman GT4 and GTS 4.0

JCR Inconel Race Exhaust Manifolds for 982 Porsche 718 Boxster GTS 4.0 and Spyder / 718 Cayman GT4 and GTS 4.0

The JCR Inconel Race Exhaust Manifolds for the 982 Porsche 718 Cayman GT4, GTS 4.0, Boxster GTS 4.0, and Spyder are designed to unleash the full potential of the 4.0L flat-six engine. Made from high-performance Inconel 625, these manifolds feature optimized collector dimensions and equal-length primaries to maximize exhaust flow and reduce backpressure. The result is a significant increase of approximately 38 horsepower and 34 lb-ft of torque compared to the OEM manifolds. In addition, they reduce weight by over 10.5lbs, improving overall vehicle dynamics. These direct replacements are easy to install, offering a seamless fit while enhancing both performance and exhaust sound. Perfect for performance enthusiasts and track drivers, these manifolds provide an upgrade that elevates power, reduces weight, and delivers an exhilarating driving experience.

Direct Replacement / Modular Fitment

• The JCR Inconel Race Manifolds are a complete direct replacement for the OEM 718 GT4 and Spyder manifold assembly. No fabrication or additional parts are required — simply remove the factory exhaust manifolds and install the JCR Inconel Race Manifolds. The manifolds are supplied with copper fitting hardware, ensuring a smooth return to stock if necessary.

Light Weight

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

Power Increase

• Each component in the JCR Exhaust line is designed to improve horsepower and torque, with results varying depending on the combination of parts. The most extreme free-flowing system installed on the 718 GT4 / Spyder / GTS 4.0 can achieve gains of up to +52.40whp and +47.00wtq (60.26hp / 54.05tq), while also offering notable improvements in engine response and mid-range torque. Deleting the restrictive factory cats not only creates a more aggressive race car sound but also enhances exhaust flow, resulting in increased horsepower and torque.

Features

• 100% inconel construction
• Direct replacement for OEM exhaust manifolds
• 4.77kg (10.52lbs) weight reduction vs OEM
• Improved sound quality
• +33.42whp & +29.77wtq (38.43hp / 34.23tq) vs OEM exhaust manifolds

Applications

• Porsche 718 Boxster GTS 4.0: 982 (2020-present) [4.0L F6]
• Porsche 718 Cayman GT4: 982 (2019-present) [4.0L F6]
• Porsche 718 Cayman GTS 4.0: 982 (2020-present) [4.0L F6]
• Porsche 718 Spyder: 982 (2019-present) [4.0L F6]

More JCR Exhaust Products for 718 GT4, 718 GTS 4.0, and 718 Spyder

• Titanium Valved Race Exhaust System
• Inconel Silenced Link Pipes
• Titanium Non-Silenced Link Pipes
• Titanium Silenced Exhaust Tips
• Titanium Megaphone Exhaust Tips
• Inconel Rolled Exhaust Tips
• Titanium Vapour Blasted Weissach Exhaust Tips
• Inconel Exhaust Tip Adapter Set
• Inconel Race Exhaust Manifold & Silenced Link Pipe Assembly
• Inconel Race Exhaust Manifold & Titanium Non-Silenced Link Pipe Assembly
• Titanium Superlight Race Exhaust System & Link Pipe Assembly

Notes

• This product is included with the purchase of the JCR Exhaust Manifold & Link Pipe Assembly
• Fits manual and PDK transmission models

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.