^ Wise words. A lot of people on here complain about how much their insurance costs, then go and mod their car without telling anyone. This invalidates the insurance, so they're paying all that money for f*ck all!
An insurance company will use whatever they can do get out of paying a claim, so if you're running an uprated backbox and, you're involved in an accident, chances are they won't pay if you haven' told them.
Svartalf, speak to tophuh, his 150bhp 1.8t is booked in on moday for a revo tune and exhaust. He should be able to give you the lowdown.