My ‘32’ low-boy had a pair of Carrera SR2254P. Carrera is owned and operated under the following company, QA1. It is a line of shocks that they provide to the race and street rod industry. They were vertically installed in the rear. One of the welds snapped due to fatigue. A ½” weld on a big coil over shock! I nearly ended up on the ground on Colorado Blvd. in Pasadena when this happened. Pot metal is what we used to call it. Japan got all our good steel and we get all the Chinese crap. This shock failed. Speedway, sells them. They are dangerous. Clearly, quality control is not in place. This fact is even more compromised by non-structural welds with no certification standards. Buyers beware!!