The correct SumoSprings Custom Helper Springs for your 2018 Winnebago Sunstar 31BE (that features an 18,000 pound GVWR), which is the part # SSF-170-40-2 for the front axle and # SSR-184-40-1 for the rear axle, will not require any drilling during installation. These are complete bolt-on applications that will simply replace the factory bump stops on the Ford F-53 chassis.
I have attached a couple short video demonstrations along with the written installation manuals for these kits that... view full answer...
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