Sidewinder Recommendation for Keystone Montana 3670rl

Question:

Not sure how to count the blots . Here are pics of both sides. Thanks

asked by: Anna E

Expert Reply:

So your Keystone Montana 3670rl will either have a Lippert 1116 pin box or the 1621. Count the amount of bolts that are on each side of the pin box. If it's 6 then you have the 1621 and you need the part # RP34FR.

If instead it's 9 you need the part # RP61412 and you have the 1116.

expert reply by: Jameson C

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Anna E.

2/6/2018

Not sure how to count the blots . Here are pics of both sides. Thanks

Jameson C.

2/6/2018

You have 6 which means you have a 1621 and the correct Sidewinder is # RP34FR.

Ryan B.

6/7/2020

I can’t seem to find the right info in any of the Q&A for the sidewinder that I am looking for. I just got a 2020 fuzion impact RV and I want to switch to a sidewinder. The factory pin box is a lippert rotaflex 19K but I can’t find a part number on it. It has 9 holes that are spaced 4.5” apart side to side and 2.5” apart top to bottom. Would the sidewinder elite 19K work or the regular 19K sidewinder? Does Reese make a 5th airborne sidewinder that is 19K? Thanks

Chris R.

6/11/2020

Do you see any numbers printed on the pin box itself that would refer to a specific model? If not, can you tell me the serial number stamped onto the king pin?