Review on Seal Kit to Easily Replace Model#HS5157 for Pivot Front Mount Steering Cylinder - Compatible with HC5340, HC5341-HC5348 HC5358 HC5365 HC5375 HC5394 HC5445 HC6750-HC6755 (Wrench Not Required) by Nathan Tsugawa

These seals are NOT original manufacturer specifications. I have a Seastar HC5345 steering cylinder and as stated they were the correct replacement seals. The end caps were very difficult to put on the shaft (without damaging the shaft or the seals). Once on the shaft it was difficult to slide them into position to screw them in. With both deployed and the system fully bled with the Junior blowdown pump, the steering system was ridiculously tight, required pressure on the wheel to get the system moving, and creaked from the excessive hydraulic pressure required to turn the moving cylinders from "too tight" seals. That would have been dangerous as the steering was stiff and jerky. I went with a genuine manufacturer part (double the price) and it was worth every penny. Don't skimp on such an important part of your security system. Lesson learned.