So I did something a bit different with the rear bump stops/jounce bumpers . Being in Texas hockey pucks aren't that common :happy175:and I hadn't purchased them before doing my lift. I installed a OME 2.5" lift. I figured it would take more work to remove the springs and drill out the pad than to do the below. In the end, it might've been easier to do the hockey pucks, but I wanted to share my experience for anyone who might have the same thoughts.
I measured the stock jounce bumper width and found it to be close to 2.5" diameter. The new 2007+ wrangler jk's have 2.5" diameter rear bumpers. My goal was to find one 2" longer than our stock ones. I couldn't find any direct replacements that weren't in a kit- there is one kit available with the proper length (for the height of my lift) but it would require an order of 50+ for them to sell the jounce bumpers seperate. The jk crowd use bump stop spacers that bolt between the frame and the bump stops, and this doesn't work for us.
I did find these that slip into the cup and the jounce bumper slides into them.
https://www.amazon.com/dp/B00CY0U7KM/ref=cm_sw_r_sms_c_api_bZlZxbBA4RAWD
I purchased these for a polyurethane jounce bumpers I assumed the length would be too long and planned on trimming them down with a lathe.:
https://www.amazon.com/dp/B007CFAZZ6/ref=cm_sw_r_sms_c_api_f-lZxbWSA94M0
Upon inspection the length was ok, only about half an inch longer so I let it ride.
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I threw the Terraflex extensions in the liberty bump stop cups with some trimming required around the diameter. They ended up being about 1/8" too big all the way around- making it overall 1/4" too wide. I used the old jounce bumper to trim the extension to the right diameter with a bench grinder. These did take some work to squeeze between the springs as well.
Once the extensions were in, the jounce bumpers fit smoothly into the extensions with no issues (they were made for them so it was expected).
The jounce bumpers themselves are the same diameter as the extensions- where the go in the cup- so if you just wanted polyurethane stock replacements these might work with some trimming.
Overall it wasn't worth it for my application due to my lift height and given the opportunity I would have gone with the pucks. However I feel that if you are lifted higher it might be a good option, and you can use the hockey pucks as well.
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