This Bilstein B6 is a rear monotube replacement for Monaco motorhomes on the Roadmaster RR8S chassis, covering Camelot, Diplomat, Imperial and Windsor coaches. Bilstein presents the B6 as a bolt-on upgrade for stock suspension: a yellow gas-pressure monotube tuned firmer than OE. It is meant to keep your existing springs and original ride height, adding control without lowering. Compared with a stock or budget unit, the case rests on damping consistency. The manufacturer cites a working piston about 63% larger than a twin-tube on most B6 models. Each shock goes through endurance, salt-spray and scratch testing before shipment. Owners on user forums describe the original Monaco-branded Bilsteins as harsh, and some point to Source Engineering's chassis-specific valving as the closer match, so compare before buying. One owner's alignment shop found a Bilstein application chart listing a different number for 2002–2010 RR8S coaches. Verify your chassis year before ordering.
Installation suits a suspension shop or an experienced home mechanic with a proper lift. The B6 is built to OE dimensions and can be fitted on a single axle, such as the rear only. Bilstein's general instructions call for installation by a qualified suspension specialist, using a chassis hoist to keep the raised vehicle secure. Remove the negative battery pole before starting. Measure the distance between the shock mounting points at proper ride height before removing the old unit. Searchers looking for a Monaco Roadmaster RR8S rear shock replacement, a Bilstein B6 Diplomat rear monotube, or a Windsor rear shock upgrade will find this to be the matching application.
Yes. The manufacturer states the B6 can be installed on a single axle, such as the rear only.
Published year ranges differ. User forums report that Bilstein's application chart assigned a different part number (24-187305) to 2002–2010 RR8S coaches, so confirm your chassis and model year with the manufacturer before ordering.
The manufacturer's installation guidance limits fitting to qualified personnel and calls for a chassis hoist. Owners on user forums also report that the factory-style rear mounts can wear out, so inspect the mounting hardware during replacement.
Plan for a chassis hoist or secure jack stands, and a torque wrench. Bilstein's instructions say to avoid impact wrenches, since they can overtighten suspension fasteners. Measure the mounting distance at ride height before removing the old shock, and leave rubber-bushed attachments loose until the suspension is loaded. Rubber-mounted strut and damper attachments should not be fully tightened until the suspension is loaded with the wheels on the ground. All self-locking nuts must be replaced. Because motorhome chassis are heavy and the rear springs are substantial, a professional install is the simplest route if you lack a hoist; the manufacturer notes that a workshop handles everything from ordering the right shocks to fitting them.
