£575.00 GBP


Engineered and developed in-house at String Theory Garage, with Eibach & JCR-Developments this height adjustable performance spring kit utilises dual-rate springs front and rear, manufactured by Eibach, to help maintain compliance when the wheel travels from rebound into bump.

After testing on both the road and track with GT3 driver Jonny Cocker from JCR-Developments we settled on spring rates which are increased by 15% front and 20% rear over standard. The increase in spring rates and slight additional rear bias work together to reduce weight transfer, improving direction change, turn-in response and rear axle support mid corner.

Direct Replacement

This kit is 100% compatible with the factory suspension and top mounts and adds height adjustment along with optimised spring rates with quick and easy fitting

OEM+ Quality

Springs in this kit are manufactured by Eibach to industry leading standards along with billet aluminium hard anodised adjusters for long lasting and easy adjustment

Key Features

  • Height adjustable enabling corner weights to be perfected
  • Springs manufactured by Eibach Germany to industry leading tolerances
  • Dual rate springs both front and rear
  • Polyeurethane clip tubing to prevent coating wear
  • Anodised aluminium adjusters compatible with standard dampers
  • Ride height change (FRONT) up to -35mm​*
  • Ride height change (REAR) up to -35mm​*
  • Spring rate changes (FRONT) +20%
  • Spring rate changes (REAR) +20%




    • £575.00 GBP
    • All prices are listed without UK VAT included (20%) All UK based customers orders will be subject to UK VAT

    Lead Times

    • JCR products are produced in batches, we aim to carry stock of all products however in the event that parts aren't in stock please allow approximately 30 - 60 business days after the point of ordering before your parts ship. For lead time estimates prior to ordering please contact us via the contact page


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