If I had the money I would retrofit my 38FB. I have spoken to a number of IS owners and they all have very positive comments.
I've been told the towing experience is much better than the 8 K axles especially on rough roads.
$5,000 seems to be a fair investment and the IS should increase the resale value down the road.
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2017 RiverStone Legacy 38FB
2018 Ram DRW, long box, Aisin, 4:10
B & W Companion
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