New twist (I think) for Canadian IS300 owners. My dealership in Montreal reconfigured both my ECU and TRAC chip. No new parts just downloads and hence no back-order delays. Results after two weeks are excellent. The car now behaves like it should; the low speed hesitation is gone and when accelerating hard in a turn from a stop, one of the tires slips a fraction, subtly reminding you what's under the hood. I'm very pleased.