Review of Lippert Fifth Wheel King Pin - Upgraded Pin Box - LC158778 Video

Great question, Jeff! When the Rota-Flex first came out it renovated what a pin box could do and be, but at this point in time that technology is a little more dated and the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box #325-GH-8040 is the…

The difference between the 1621 and the 1621SHD is weight capacity and how many bolts is required to mount it. The 1621 uses 4 bolts for mounting. The 1621SHD requires all 6 bolts to be used.

Because it's lighter, less expensive, has fewer moving parts and is mechanically less complicated I'd recommend going with the Gen-Y #325-GH-8040 shock absorbing pin box versus a Trailair Flex Air like part #LC328492. The Trailair…

I am sorry Lippert did not include their instructions with your Lippert Trailair Air Ride 5th Wheel Pin Box #LC158778 but I have included a link to them on the Lippert website. I also linked an image of page 3 from those instructions which shows…

In general the height between the fifth wheel pin boxes aim for the same figures so that they don't cause the trailer to sit drastically different. I attached a dimension picture for the #325-GH-8040 for you to check out and compare to what…

In general the aftermarket pin boxes do achieve a better clearance than the stock pin boxes simply because they offer more adjustability. The Trailair Flex Air 5th Wheel Pin Box #LC328492 will give you an additional 3-3/4 inches in length and the…

The Trailair Air Ride 5th Wheel Pin Box does not have a pin weight capacity figure according to Lippert. Typically a trailers pin weight is 20% of the total weight of the trailer. That means your trailer should weight around 15,500 lbs. Trailair…

When using a Trailair Air Ride Pin Box, like part #LC158778 that you referenced, you should inflate the air bag to the line on the shock once it has been connected to your 5th wheel hitch. I have attached a review video where you can see this…

The correct replacement for your Lippert 1621 pin box is in fact The Trailair Flex Air 5th Wheel Pin Box #LC328492 and is rated for 18,000lbs; I did contact Lippert to confirm this, and they agreed this was information was accurate even though your…

Even though both the Trailair Air Ride #LC158778 and the Trailair Flex Air #LC369535 look similar and incorporate the air bag and shock to help improve your towing experience, the Flex Air has a few upgrades that the Air Ride does not have. The 2…

The Demco Hijacker Autoslide 21K #DM8550038 weighs approximately 305-lbs. The head of this hitch weighs around 70-lbs and can be removed to help make moving and installing this 5th wheel hitch a little bit easier.

The Demco Hijacker Autoslide #DM8550034 has a weight of 273 lbs. I've added a couple links to video reviews of this hitch for you to take a look at.