I recently replaced the front shocks on my 40-footer with Koni’s, but they didn’t have any in stock for the rear. So, I ordered the heavy-duty ones Prevost offered, and they ended up sending me Monroes at a pretty good price. The Koni shocks look much more robust by comparison.
The improvement in how the coach handled, especially with reduced leaning, was incredible. It was probably the best upgrade I’ve made to the coach. Another thing that helped with road wandering was adjusting the slack in the steering box. Be cautious here, as it’s easy to overdo it. Mine only needed a 1/4 turn—don’t go beyond 1/2 turn. It’s an easy adjustment, but if you’re unsure, any good truck front-end shop can handle it.