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It's certainly no secret that the 981 GT4 & Spyder are regarded as one of the greatest sounding modern Porsche's from the factory in recent times. However, there's still more to be had!

Adding to the soulful scream of the 981 GT4 & Spyder, reducing weight and uncorking the 3.8 Flat Six with our Inconel Race Manifolds certainly is a great place to start.

Direct Replacement / Modular Fitment

The JCR Inconel Race Manifolds are a full direct replacement product for the OEM 981 GT4 and Spyder 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.

Power Increase

Every component of the JCR Exhaust line is guaranteed to improve HP & TQ with varying results dependant on the combination of parts.

Deleting the highly restrictive factory cats along with optimising the primaries and collector design not only brings a hard edged race car sound but also drastically improves flow resulting in increased HP & TQ.

Key Features

  • 100% Inconel Construction
  • Direct Replacement for OEM Manifolds
  • -6.52kg (14.37lbs) Weight Reduction vs OEM
  • Improved Sound Quality
  • +28.12WHP & +26.91WTQ (32.34HP/30.95TQ) vs OEM Exhaust Manifolds


  • 981 Cayman GT4
  • 981 Boxster Spyder


  • £5995.00 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£5,995.00 GBP
    INCONEL RACE MANIFOLDS Sale price£5,995.00 GBP