stock Billies are OK all round on a stock Disco and RRC and are OK on the front of a 110/130, but should be re-valved for the rear and definitely have to be re-valved for a 130 rear. The spring rate on a 130 is well over double a RRC, so how on earth can a damper valved for a RRC control the 130 springs ?
(and Koni do the same thing, but at least you can double the rebound on them)

