I know the suspension is onr of the listed differences in the journey and sport but i never understood if the sport just had a stiffer suspension or if it was actually lower. And is there anyway to make the suspension as stiff as the sport? Can you swap out the springs etc?

 

I don't think the springs are different, only damping and sway bars. Maybe bushings, too.

 

The Sport and Base/Journey are the same ride height. Even the IPL is the same
The only version that rides higher is the AWD
My research tells me that there are a number of different part numbers for the suspension of the Sport vs Base.

Rear Sway bar
562301BA1B Base
56230JL01B Sport

Rear springs were the same until 2010 at which time the Sport got a redesigned rear spring.
Part Number: 55020JL00C
vs 55020-JL31B

Rear Shocks
E6210-JU50A for the Sport
E6210JL00B for the Base
E6B10-1A36A for the IPL


Front Springs
54010JK12A - Base
54010-JL02A - Sport
E4010-1A36B- IPL


Front Shocks
E6110JL00C Base
E6110-JU51B Sport
E6A10-1A36A IPL

Front Sway bars:
Part Number: 544651EA1B- Base
Part Number: 54610JL00A - Sport


Same bushings for both it seems

Source https://parts.infinitiusa.com/

 

No struts on the G. I wish everyone would get that. And that web site has it wrong. FSM has it right.