Whats this ?

[Howard]

Sorry to sound like a dumba$$

but what's this ?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=70143&item=7989762079&rd=1

 

[andy_k]

I believe it's a spring travel limiter, they are often used in conjunction with lowered springs to shorten suspension travel, stop coil over shocks bottoming out and potential damage. Not sure on the legality of them though.

Andy