You really don't ever want to give an insurer an excuse to back out of paying a claim. Carefully wording the modification when presenting it for consideration can make a big difference. Always get their acceptance in writing too when you notify them about a mod.
So you have a washable long life replacement airfilter and low brake dust pads that perform better than the standard ones
Then you have had the head refurbished and cleaned up and the engine has been stripped down and rebuild by hand to a better specification than the factory for RELIABILITY purposes.
Bring on the next batch of Modifications and we'll have your insurers writing to you pleading for you to do more....