[Woobn8r]

Well I agree and disagree....

The purpose of a roll cage is SAFETY and the bi-product is a reduction in chassis flex.
YUP, boxed arms flex less....making suspension set up and handling more predictable...the bi-product is strength to withshand increased (or unforseen) force(s)....

However to finish first, you must first finish so preventing failure is even more important especially if a weakness has been identified and is easily corrected....l

On the street this same identified weakness(s) can be corrected and is more of a "no brainer" as you are less concerned with rules or weight or class structure, but are probably more concerned with reliability....unless your tow vehicle and trailer follow you everywhere.

I don't understand why anyone would not consider modifying their trailing arms, unless their class rules prohibited it or it was for concours purposes. It is simply a better arm.