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://www.perryparts.com/product-page/ab15r-6th-gen-4runner-rear-bump-stops-2025

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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