Anyone know if 00-05 (I think those are the years) IS300 parts fit on a 97-01 ES300? (strut bar/ Tein flex coilovers/ aftermarket shortram intake<<(where the sensor plugs in)

 

im almost certain it doesnt. get your strut bar from either ebay, the stock solara bar, or the trd solara bar if your willing to modify your hood.

your options on tein coilovers are only tein ss, i believe. but other companys such as jic and ksport also produce coilovers for this platform just search for camry/solara coilovers if you can't find much for the es.

For intake, search for the camry/solara injen short ram.

As you can see, a lot of our parts are interchangeable with the camry/solara

 

exactly what ES BL155 said: Camry/Solara is the platform to look at.