Joth

Im after a bit less roll in my Forester, and I've already get a 20mm STI rear bar (stock was 13mm) and solid links all around, im looking to see what I may get at the breakers for the front. I have a 19mm front bar, could I get a summary of what thickness front bars have been used in the japanese WRX and STI's over the years? Would help me alot in sourcing one from them, as they never seem to get down to such detail here.