Quote Originally Posted by JS154 View Post
That's good point. Take a semi-trailing arm rear suspension that comes with normal rubber bushings for example :

heim joints/rod ends are allowed in place of bushings. does that constitute altered?
does adding a reinforcing bar/plate/gusset constitute altered?
seeing as it doesn;t really matter what shpe the actual arm is within the three point(two pickups and hub placement) it kinda doesn;t matter what goes on in the middle.

but keeping the same arm arm geometry, and keeping the same pickup points, but making the arms out of HY100 or Ti3Al2.5V...would be a stornger lighter trailing arm...does that constitue altered?

I would think that moving pickup points clearly is "altered".
I just submitted this question as well.

EH