i bought a used viper and the trailing arms are different. one has no stampings in it and the other has a M stamped. which one is original and whats the other one from? thanks alot
'M' is the correct arm, the non stamped one is likely an aftermarket replacement. If the tube the spindle runs through is the same length as the 'm' arm, then the other important measurement (caster) should be the same, unless the manufacturer was an idiot.