I haven’t heard of those rear shocks before. When I was in the market for rear shocks to replace the Progressive 418s on my 83 FXR I went with Race Tech 14s I always hear people talking about Ohlins and rightfully so or Progressive...FOX...Legend etc and I’d only heard about Race Tech when people talked about front end suspension but I couldn’t be happier with em on the rear.Unless you already have made the decision about the rear shocks I recommend you have a conversation with the folks at Pro-Action. I had them put a set on my '85 FXRS a couple of years back while at Bikeweek-Daytona, replacing the one year old Progressives. MAJOR improvement and well worth the cost difference.
btw: Is that 18,017 the price in US$ Elvis is asking for that part..??