Now about fifteen years old and having covered well over 150,000 miles, occasionally very heavily laden, my TI Console Stage II heavy duty springs have stood up extraordinarily well. A production error in an early batch led to the failure of a single spring eye (this was the supply of slightly oversized bushes and not a fault with the spring itself), but the the springs have been otherwise faultless and continue in service in as-new condition. The transformation they gave the vehicle when first installed was incredible, though one must be mindful of unfairly comparing new parabolics to rusted old multi-leaf springs, and they continue to give a far suppler and more compliant ride. The height doesn’t drop much with a very heavy load, either, unlike coil sprung vehicles. The only issue is the amount of body roll that occurs with a heavily laden vehicle, especially with a high centre of gravity. I have added an anti-roll bar and upgraded the front springs to three-leafs to try to deal with this issue, but it is a characteristic of the vehicle, not the springs.
Heystee products (there is a wide range of modifications to Series Land Rovers) are notoriously expensive, but you do get what you pay for. There are many brands of parabolic spring on the market, some of which are quite cheap, but their prices are low for a reason; stories of sagging, bent or even snapped springs are common place on the various forums and club sites. While Rocky Mountain springs offer a very good compromise of quality versus cost, if you have the budget, this is the way to go. Don’t forget to use appropriate gas dampers – I find Pro-Comp ES9000s effective with my set up.
Effectiveness: 9/10
Value for money: 8/10
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