JCR Inconel Race Manifolds – Porsche 718 GT4 RS / Spyder RS

The Porsche 718 GT4 RS is a masterpiece of Porsche engineering, but the exhaust system still holds back the potential of the high-revving 4.0L GT3-derived engine. The OEM manifolds are designed with restrictive pipe diameters and heavy materials, leading to unnecessary flow limitations, extra weight, and a less impressive sound than the engine truly deserves.

The JCR Inconel Race Manifolds completely replace the original manifolds. Thanks to the use of 100% Inconel 625, an extremely heat-resistant material also used in Formula 1, this system combines maximum flow with weight reduction and durability. The result: a raw motorsport sound, quicker revving, and measurable performance improvements on both road and track.

Key Features

• 100% Inconel construction – ultra-light and resistant to extreme temperatures

• Direct replacement of OEM manifolds (no modifications needed)

• -3.28 kg (7.24 lbs) weight saving vs. OEM manifolds

• Improved gas flow and motorsport sound

• +22 hp and +41 Nm peak gain versus OEM manifolds

• Developed and tested in real-world conditions, including track use

• Better torque and response throughout the rev range

Real-world performance
The JCR Inconel Race Manifolds have been developed through intensive track testing. The result is not only improved peak output but also significantly faster throttle response and improved acceleration. In 100–200 km/h measurements, noticeable improvements were recorded – improvements that every owner will immediately feel.

Application

• Porsche 718 Cayman GT4 RS

• Porsche 718 Spyder RS

Product Notes

• Also referred to as Race Exhaust Manifolds

• No ECU tune required for models without OPF monitoring

• EU specifications with OPF monitoring require an ECU tune or OBD error delete module

Lead Times

All JCR products are produced in batches. We strive to have stock, but if this product is not in stock, please allow for a lead time of 30–60 days from order. For current lead time information before purchase, please contact us via the contact page.