A Permanent Fix for Your Coolant Bottle with Added Cooling System Margin As these cars age, the original plastic tanks are failing. This aluminium replacement tank restores margin to the cooling system by increasing expansion volume from approximately 900 mL to 1700 mL, while retaining factory mounting points, hose routing, and pressure strategy. The result is a more predictable, durable, and serviceable cooling system without altering how the car is designed to operate.

Confidence That the Cooling System Will Behave When the Car Is Hot

• Increased internal volume (1700 mL vs ~900 mL OE)

• Provides additional expansion headroom before the pressure cap opens

• Reduces the likelihood of coolant venting during heat soak

• Internal de-aeration baffling

• Helps separate air from coolant

• Supports consistent coolant recovery during cool-down cycles

Peace of Mind From Eliminating a Known Age-Related Failure Point

• Fully TIG-welded aluminium construction

• Resists long-term degradation from heat cycling, pressure fatigue, and UV exposure

• Billet aluminium filler neck

• Maintains a stable, repeatable sealing surface for the radiator cap over extended service life

Less Guesswork, Easier Ownership

• Integrated sight glass

• Allows fast, accurate coolant level checks without removing the pressure cap or estimating fill height

• Manual bleed provision

• Simplifies cooling system bleeding during installation and routine service

• Simple fitment - direct replacement for OE

• Can be installed in less than 30 mins by a competent home mechanic

• Supplied complete with radiator cap

Model Compatibility

• S2 1ZZ Elise 2006 to 2010

• S2 2ZZ Elise & Exige S220, S240, S260 2004 to 2011

• S3 1.6 Elise 2011 to 2014

• S3 Elise 2011 to 2021

• Lotus 2-Eleven