996 Turbo - Tuning - Insurance?

[stubbsy996]

I think I'll shortly bite the bullet and go for a Milltek sports exhaust, (the noise of the PSE is the one thing I really miss on my previous 996 C2),
possibly with a remap. Lots of you guys out there will have done similar so I just wondered how much difference it made to your annual insurance premium?
BTW - I'm currently insured through Admiral don't know what their policy is with regard to tuning. Anyone else done similar and insured with them?

[TTX50]

Also with Admiral and have a 996 Turbo with Kline Innovation exhaust. I just ticked the box in modifications on the website that said sports exhaust or similar. Can't believe it made much difference, as still got very cheap insurance. The Kline Innovation exhaust is a crossover with 200 cell cats. Sound wonderful (pretty loud) and much cheaper (on ebay!) than Miltek etc.