This varies from insurer to insurer. Allianz, for example, will not insure you if you make any performance modifications whatsoever.
Personally, I would recommend that you check with your insurer before making any changes, and ensure they'll cover you. If not, go elsewhere. There would be nothing worse than a denied claim due to uninsured mods. Some insurers will charge a higher premium for the mods (including Shannons at time of writing); others - such as the NRMA in NSW - shouldn't charge you more, or even in some cases require the mods be listed, as long as they're all legal.
Bookmarks