Oh come on guys, don't be asses He has previously said that "I do have a problem with reading and tend to miss alot of stuff"
Thanks to our good friends at wikipedia, here is a fool-proof explanation for why you would need one:
A turbo timer is a device designed to keep an automotive engine running for a pre-specified period of time in order to automatically execute the cool-down period required to prevent premature turbo wear and failure. After a period of driving when a turbocharger has been working hard, it is important to let the engine run at idle speed for a period of time, allowing the compressor assembly to run down in speed and cool from the lower gas temperatures in both the exhaust and intake tracts. At the same time the lubricating oil from the engine is able to circulate properly so the turbine won't burn the lubricating oil that would otherwise be trapped within the charger with the turbine rotating at high speed.
As with most parts, they are not illegal to HAVE... they are just illegal to USE. And bear in mind that they in the case of theft, they do make it easier to find the ignition wires... or so i've been told
Anna