Sports Pack was an optional extra on the car when it was new, you need to declare it on insurance quotes though... not that it actually does anything, just a bodykit and a differant exhaust (not performance)
Annoying I'm doing a similar job still, just through my own company... Do'h.
Edit @ GoNz0
Yeah, knowing my luck in the event of an accident they wouldn't pay out though... sneaky bloody insurance companys!
And yeah, I wasn't really moaning about the actual amount, just the huge increase for 3 tiny changes (2 of which should have benefitted the cost anyway!)
328? Nice =)