We were discussing in this thread -

https://www.myg37.com/forums/g37-sed...37x-sedan.html

whether or not there is any difference in the steering set up, or any mechanical differences at all, between the x and xS sedans. I was under the impression all the differences were purely asthetic. Can anyone confirm or refute this? Could any difference "felt" be attributed to the larger performance tires?

I searched but I couldn't find anything specific.

 

Infiniti G37 Sedan Specs: 2010 Infiniti G37 Sedan Specifications and Options
Lists steering ratio for the x as 16.4 : 1

Infiniti G37 Sedan Specs: 2010 Infiniti G37 Sedan Specifications and Options
Lists same 16.4:1 steering ratio for the base as the X. Same for the journey if you search for that model.

Infiniti G37 Sedan Specs: 2010 Infiniti G37 Sedan Specifications and Options
Lists RWD sport steering ratio as 14.7:1

Unfortuntately, it does not list anything for the Journey with sport package or the X with sport. However, according to motortrend:

Despite not getting the quicker steering ratio that the G37 S gets, the G37x S still feels plenty sporty, though it would be nice if the turning radius hadn't increased by nearly a foot.
2009 Infiniti G37x S Sedan - Specs - First Test - Motor Trend

 

Sport seats, and a red S on the butt...