Marvi: Thanks for the comment
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I believe that the IRS stiffining kit can be directly bolted onto the stock chassis....although I do not know what the effects of it are. The carbon fiber corner braces are flat and do not have a curve like the stock ones. This is where the side braces come into play. They sit inbetween the carbon fiber braces and the aluminum standoff or stock chassis. the side braces are the correct width to fill the gap caused by the carbon fiber corner braces being flat, and fit perfectly inbetween the brace and the irs standoffs/stock chassis. Again, I don't know how this will effect handling on the stock chassis...you may just have to experiment
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