I'd love to see a dyno comparison between the IS300 and IS350. I can't imagine that there is as much HP differential as Lexus states. Anyone know if the de-tuned 3.5 is just software or also hardware?
It's my understanding that the 3.5L in the 300 is the port injection engine and the 3.5L in the 350 is the D4S - substantial differences.
Ya, that's a big deal. Wonder why the 3.5 in the IS300 is so much lower in HP vs. the 3.5 in the Sienna/Camry, etc., etc. Those are port injected, and don't require premium fuel. This is a bit of a bizarro offering.