By Radium Engineering

Radium Rear Clamshell Shim Kit - Lotus Exige (All)

Regular price $118.00
Regular price Sale price $118.00
Shipping calculated at checkout.
Availability: In stock
SKU: 20-0055
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Regular price $118.00
Regular price Sale price $118.00

This kit was designed to replace the factory Lotus Exige steel body shim spacers (shown below) with a permanently secured lightweight alternative.

The factory Lotus shims can be a nuisance if the clamshell is removed frequently. Because the shims are taped to the rear subframe, they easily lose their adhesiveness and alignment with the 4 trunk mounted through holes. They can also slip out from underneath each other and get lost. This kit fixes these problems by permanently securing the Radium shims with a flat countersink screw and locking pinch nut.

The shims start with 5052 aluminum plate and are laser cut with lightweight features. They are then media blasted and anodized black to protect the surface from oxidation. This makes for a weight savings of 73% from stock. Note: the thickness of the shims are consistent and may vary slightly from the factory shim stack, but no noticeable difference in body fitment can be seen.

The aluminum Radium shims bolt in place for a more permanent solution using stainless steel countersink hardware.

Comprehensive instructions are included with the kit. This manual includes details on removing the Exige rear clamshell, installation of the shims, and additional information on further improving the removability of the rear clamshell.

Initial removal will take 1.5 to 2 hours. However, with some modifications, as detailed in the manual, the process can be reduced to 10 minutes or less.

Includes:

  • Laser cut anodized aluminum body shims (x4)
  • Stainless steel countersink M6 screws (x4)
  • Conical top M6 oval locking pinch nuts (x4)
  • Detailed installation instructions

What clients say


  • Really fast and high quality customer support, my order got to me faster than the quoted time too. No complaints

  • The team took a mostly broken car after some work done elsewhere, and have systematically made it reliable and fast for a fair price. The staff are invested in the work they do which also makes a big difference.

  • Jeff was extremely helpful in assisting me with my exhaust. Always kept me updated and answered any queries in a timely manner. Will definitely be coming back for my future mods

  • Justin and his crew is amazing! Always ready to help and service with a smile. Trusty, friendly and reliable! Had my car sent in for repair twice and it’s fixed on time, at a reasonable price and with no issues. Highly recommended!

  • Easy to deal with and part was ordered quickly

Fitment & Compatibility


How do I know if this part fits my car?

We recommend checking your vehicle's make, model, year, and variant carefully. Most product listings include compatibility notes, but if you're unsure, contact us before purchasing.

Can you confirm fitment before I place my order?

Absolutely. Send us your VIN or Rego and we’ll confirm fitment for you.

Do you offer installation at your workshop?

Yes, we offer installations for most parts at our Ringwood workshop. Contact us to book or get a fitting quote.

Shipping & Handling


How long will it take for my order to arrive?

Most in-stock items ship within 1-2 business days. Delivery time depends on your location and shipping option chosen at checkout.

Do you ship internationally?

Currently, we only ship within Australia. For international enquiries, please contact us directly.

Can I pick up my order in person?

Yes, local pickup is available from our Ringwood workshop. Simply select ‘Local Pickup’ at checkout and we’ll notify you when your order is ready.

Please note: Some items are stored offsite and may need to be transferred from our warehouse, which can add a few business days before pickup is available.

Returns & Warranty


Can I return a product if it doesn’t fit?

Returns are accepted within 14 days if the item is unused and in original packaging. Please see our full Returns Policy for details.


What warranty comes with your products?

All products come with the manufacturer’s warranty. If you experience any issues, contact us and we’ll assist with the claim process.