Hello,
James here from Energy Suspension.... very cool to see forum members making their own adaptations!
Something to look for in the future, this is still a little while off, but the new Rockflex bump stop is going to be available for 4Runners around the end of the year. It's a progressive rate bump that will give you the same rate as an MCU bump at first, then gradually stiffen up. You won't feel a hard hit, rather, a smooth engagement.
We have already released the bump for the Jeep JL, it has a molded in metal washer base that will allow you to use it with almost any single-bolt application. We have plans to release it for Toyota later this year, but early adopters have already fitted them to the 4Runners.
Part number has been released, but I'm not at work right now. I'll have to post it later. It just barely arrived to market.
Here's a video from the SEMA show for their debut on the JL.
The very next adaptation of this part will be a Toyota IFS version and a rear two-bolt adapted version. The kicker will be the new rear coil bumps featuring rock-flex, that will fit 3rd-5th generation 4Runners.
We also already make high-articulation 3-piece rear arm bushings for 3rd and 4th gen factory arms, I've got approval to bring in a 5th gen to our facility for R&D sometime this year.
I managed to get hold of some of the JL prototypes, lobbed off the top of them, then tested them out on my 3rd gen IFS at the Hammers with great results. Can't wait to get an IFS specific version to market!
