Perry Parts Bump Stops 6th Gen 4Runner - Install & Review

[Trail4R]

AB15R 6th Gen 4Runner Rear Bump Stops (2025+)​

Just wrapped up an install of the Perry Parts bump stops on the 4Runner. The install was straightforward, super fast, and completely bolt-on. They're designed specifically for the frame rail mounts on the 6th Gen and come with a base plate under the bump stop that mimics the OEM plate found on the OEM bumps.

• Find them Online: https://perryparts.com/collections/6th-gen-4runner-2025/products/gx-550-15r-rear

What makes Perry Parts stand out against the competition is price, performance, and insane testing. I don't think I've ever seen anyone do as much product development testing as Patrick. If you head over to his Instagram page, it's just test after test after test. Improvement after improvement. This guy is working his ass off to ensure we have a bullet proof bump stop TESTED under extreme conditions on the Dyno until the product either passes or explodes. Tuned on a suspension dyno with adaptive compression damping and a variable-density progressive layout, these bumps are designed to soak up harsh bottom-outs while still feeling smooth during normal driving. Whether you’re out crawling or just cruising fire roads, they will add additional control and hopefully, in our case, prevent bottom outs. Backed by a two-year, no-questions-asked warranty, they’re clearly built to take a beating.

We're heading out for a trip this weekend, so I wanted to get these installed for some testing.

The last time we went out, our rear tires were making contact with the fender and fender flares. We will see if the 3" bump stops we installed here will provide enough uptravel while limiting tire contact with the fenders and fender flares.

Perry makes a few options of bump stops for the 6th Gen 4Runner:

1. Regular Version: 75mm (factory shocks)
2. Extended Travel Version: 105mm (extended travel shocks / 2" lift)

Perry Parts 75mm and 105mm Bump Stops Vs. OEM Bumps​

The factory bump stops are around 2".

The 75mm measures out to 2.9"

The 105mm measures out to 4.1"

For now, we're going with the 75mm bump stops to maintain as much uptravel as possible while limiting tire contact. When we upgrade to a new suspension, we'll swap in the 105mm bump stops.

1. Insert Nutserts​

Start by inserting the nutserts into the Polymer.

If you fully thread the bolt into the insert and then remove the bolt and insert together from the bump stop, you’ll gain a few extra millimeters of wiggle room. This added play makes it easier to start both bolts during installation. The insert is tapered by design, which helps realign and center the bump stop once everything is tightened down. That taper is intentional and accounts for slight variations in Toyota frame tolerances.

2. Thread Bolts​

3. Install Bump Stops​

Start by getting your threads started with one bolt, and then get the next bolt started. Once both bolts have a few threads of engagement, you can torque them both down to 25 ft-lbs.

 

[Trail4R]

Some additional shots of the bump stops installed.

 

[Archer80]

Great Writeup, Looking forward to your report after your trip.

I'm interested to see if the 75mm works out for you. I'm going out this weekend to test my new Wild Peak 285/70/18 R/To1 (34x11.7) tires with the stock Pro lift. Cleared in testing but I know how that goes.


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[Trail4R]

@Archer80 - the 75mm bump stops should work well for your setup.

The 75mm bump stops did not work for the +25mm offset & 35x12.5R17 wheels, though. We're still rubbing on our fender flares in the rear, causing them to come when the tires are fully stuffed in the wheel.

I will swap in the 105mm bump stops and see where we're at on the current setup (Peak Suspension 2.25" leveling kit and 2" rear spacer) but we really need a combination of trimming the rear fenders, a new full suspension (3" front and rear). The downside of running the 105mm (4" bumps) with the 2" kit in the rear is that we start to limit uptravel. Need to get a full suspension on sooner than later.

A couple of shots from the weekend.

 

[PerryParts]

Glad the install went well! Those shots look incredible.

Our standard height rear bumps are designed to compress down to an equal length as OEM, which definitely explains why you're still seeing some rub at full stuff with those 35" tires and negative offset.

If you try the extended version, that should sort out the rub - you're totally right that you'll lose a little bit of travel though. The extended bumps will limit travel by 1.1" compared to the standard version. They're a bit stiffer, and also taller.

We could also cook up a custom set for you in the meantime to minimize rub while preserving as much up travel as possible - Let me know!

Happy Trails.

 

[Archer80]

Thanks for the follow up, Good luck with the 105mm. I built my dedicated offroader with a torch, grinder and a welder to fit as big as a tire I could, motto was "It's Only Sheetmetal" this one's a little different for a decade or so.

I think I"m good with the R/To1's, twisted it up pretty good yesterday and had no contact but was under 1/16Th at the crash bar.

I think your right, a 34" tire on a 2" lift or Pro or TH is about the limit without starting to modify and the R/To1's stand right at 34". The 11.7 width worked out too, any wider and I would have had contact. I'm sure changing the offset would allow for a little more but that's not in the cards right now for us poors..

 

[Trail4R]

We could also cook up a custom set for you in the meantime to minimize rub while preserving as much up travel as possible - Let me know!

Yeah, what would you recommend for my current setup? I forgot you guys make custom bumps for individual user applications. That's actually pretty amazing. Would you go with a 105mm just in an ultra soft version, or somewhere in between the 75mm and 105 with the same stiffness?

 

[Trail4R]

I think I"m good with the R/To1's, twisted it up pretty good yesterday and had no contact but was under 1/16Th at the crash bar.

Hell yeah, any shots of the rig?

 

[Archer80]

Hell yeah, any shots of the rig?

Unfortunately no, it rained all day so we only got vid from the go pro mounted on the dash.


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[Archer80]

I pretty much let the go pro roll most of the day so I have some editing but here's a short one unedited.

I'm new to this editing thing and I can't figure out how to save an edited vid yet. Not very tech savvy. Think I may just put my A119 Mini 2 dashcam up there and let it do 3 minute vids.

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[kophoto4x4]

Changing out my rear coils and need to pick up some bump stops and install them while I am back there might check these out!

 

[Trail4R]

@kophoto4x4 yeah hit up @PerryParts you guys would bro out on the 3D print life. lol