I am just curious. After reading a few postings and some of the sites like Steeda, what upgrades require computer flashing and/or upgrading fuel to 91 octane? I intend to do some upgrades myself but want to know what each one will require. If I just add the CAI, will I chip or upgrade gas?

If I add underdrive pulleys, will I chip or upgrade gas?

If I upgrade the exhaust, will I chip or upgrade gas?

These are probably the main 3 changes people will do so I am curious as to what each will require.