I read on another forum that the 2004 IS300 sportdesign has a euro suspension with stiffer shocks and a thicker rear stabilizer bar can anyone confirm this. And does anyone know if this includes the stiffer springs a normal manual is equipped with.

 

if its the 5 speed manual yes. it has "european suspension"

 

But is i different than a stock 5speeds suspension.

 

yes, its suppose to be anyway