Well, power gains does not stack up. For example, the chip adds 15hp, the exhaust adds 8hp, the intake adds 7hp which totals up to 30hp, but this is not true. It would maybe be more like 22hp with all the mods.

The ECU's are able to readjust fuel trim by up to a difference of 25%, so it will be fine with the mods you specified. You should be worried when you go with more extensive modifications like camshafts, port & polish, etc.. and a custom program is recommended

Gary