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The new 718 GT4 RS has been receiving excellent reviews from magazines and customers alike. Porsche have worked hard to improve sound over that of the 718 GT4 and the introduction of the new carbon airbox inside the cabin certainly wakes up the interior sound however the exhaust sound really leaves a lot to be desired.

From the factory the 718 GT4 RS is installed with an adapted version of the 718 GT4 rear silencer. This silencer features an extremely small pipe diameter which acts as a significant restriction to the 9000rpm GT3 derived engine which now features in this model.

Our rear silencer not only removes this significant restriction within the exhaust system but also drops weight and delivers a true GT3 howl.

Direct Replacement / Modular Fitment

The JCR Inconel Race Manifolds are a full direct replacement product for the OEM 718 GT4 RS & Spyder RS manifold assembly. No fabrication required and no additional parts. Simply remove the factory exhaust manifolds and replace with the JCR Inconel Race Manifolds.

Light Weight

Due to the 100% Inconel construction the JCR Inconel Race Manifolds removes an impressive amount of weight from the factory exhaust set up. This truly is a win win modification.

Real World Performance Improvements

Every component of the JCR Exhaust line is guaranteed to improve HP & TQ with varying results dependant on the combination of parts installed on the car. Our most extreme free flowing system installed on the 718 GT4RS will see gains up to 35hp along with great improvements in engine response and mid range torque.

Development of these parts has been driven by real world testing performed on the track. We measure before and after 100-200kph acceleration times and the time improvements found with our exhaust systems installed can certainly be felt and appreciated by each of the owners who invest in these parts.

Key Features

  • 100% Inconel Construction
  • Direct Replacement for OEM Manifolds
  • -3.28kg (7.24 LBS) Weight Reduction vs OEM Manifolds
  • Improved Sound Quality
  • Peak gains of 22HP & 41TQ vs OEM Exhaust Manifolds

Product Notes

  • ALL models WITHOUT OPF monitoring do NOT require ECU tune
  • EU specification cars with OPF monitoring will require ECU tune to avoid CEL or use of OBD error delete module


  • 718 Cayman GT4 RS
  • 718 Spyder RS


  • £6195.00 GBP
  • All prices are listed without UK VAT included (20%) All UK based customers orders will be subject to UK VAT

Lead Times

  • All JCR products are produced in batches. We aim to carry stock of all products however in the event that parts are not displayed as IN STOCK then please allow approximately 30-60 days from the point of order before your parts ship.
  • For lead time estimates prior to ordering please contact us via the contact page.
Sale price£6,195.00 GBP