I have never lost any sleep about any warranty, whether for a motorcar, motorcycle, vacuum cleaner, home renovation, etc. Folk tend to forget about common law and consumer protection act(s). Warranties originated as a seller's
attempt to LIMIT the buyer's rights provided under the aforementioned and was never intended to add to the buyer's rights or to protect him/her in any way. I already went on a roll about that here previously;
Hairline Crack on Exhaust Header.
Penner's '
all other markets' tune fiddles the fuelling a tad (adding some at lower rpm) and opens the throttle body butterflies - not even by more than the physical throttle position. His US/Canada tune similarly also slightly fiddles the timing somewhat in the same rev-range - alternatively advancing and retarding. No open air-cleaners, extreme-overlap cams or other
physical engine-aspiration-related modifications are being implemented. Moreover, the OEM has not explicitly locked the ECU to prevent reprogramming it on anything except OEM-specific hardware - so we are not hacking the ECU. Just take care always to be upfront with one's dealer, as mentioned earlier in earlier posts. And even in writing should the opportunity arise.
As pfos1 implies above, things obviously change somewhat if we bolt on a blower or need to clearance engine components to allow high-lift cams to rotate freely. But only strictly as related. A physical engine modification has zero bearing on misbehaving indicators, for example, as reported in another thread here.