I can't decide on which one to get. I kno the ITR is 23 mm and the ST is only 19 mm but I was wondering if ST's rear sway bar is better because of the mateial used to make it. I'm really unsure about it so I wanted to ask around. Thanks for reading.

 

If you are worried that either sway bars will break, there are other things that will break before the sway bar. Material doesn't matter. The main point in adding sway bars is to achieve a good balance. You can read what other people's combinations are to figure that out.

USDM ITR is 22mm BTW. 98 spec JDM ITR is 23mm.

 

I would go with the ITR 22mm rear sway

I purchased one and put it on with the beaks sub-frame reinforcement kit and it make quite a difference in handling

 

ST is a direct bolt on while the ITR requires a kit to reinforce the subframe

ive got the ST on my 91

 

ITR.

 

ITR requires a sub-frame brace so it doesn't tear the chassis

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DA9 Purist &raquo;</TD></TR><TR><TD CLASS="quote">ITR requires a sub-frame brace so it doesn't tear the chassis </TD></TR></TABLE>

they are quite cheap and fairly easy to install for the improved handling that the sway bar provides

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DA9 Purist &raquo;</TD></TR><TR><TD CLASS="quote">ITR requires a sub-frame brace so it doesn't tear the chassis </TD></TR></TABLE>
$150 for my setup, and I bought the beaks kit instead of bsq, BSQ is only $20, and then 80 for the sway bar.

% stiffness compared to stock = (new diameter/stock diameter)^4

If the st swaybar is 19 mm, that would mean the ITR 22mm swaybar is 29% stiffer than the st bar.