25mm Knuckle Upgrade Kit Review

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The Marlin Crawler Heavy Duty 25mm Chromoly Pin Upgrade

Marlin Crawler 25mm Knuckle Pin Upgrade Kit

 (click on images for a larger picture)

Marlin Crawler 25mm Pin Diameter Comparison

When we sought to build Toyota pins as large as Dana 60 lower pins, we never knew the results would be this fantastic.

The image to the left clearly defines the 47% size increase of the 25mm Marlin Crawler Knuckle pin.

By replacing your stock 17mm pins you are increasing the durability and also the safety of your Toyota-axle 4WD vehicle.

Also of interest is that the stock component is a 1-piece cast setup whereas the Marlin Crawler component uses a Chromoly pin that is pressed into a solid billet cap, just like our High Steer arms.

Marlin Crawler Knuckle Bearing 25mm 17mm comparison

Here we have our new updated High-Capacity 8,500 pound-force 25mm KOYO knuckle bearing.

The inner diameter literally dwarfs that of the stock NSK bearing.

Can you believe that our KOYO bearing is 54% stronger than the stock Toyota bearing? You better believe it baby!

Not only is our pin 47% larger, but our bearing is also 54% stronger to boot! It is a total upgrade package!

Marlin Crawler Heavy Duty Fastners for Knuckle Upgrade Kit

Knowing that no steering linkage is attached to the lower cap, designing stronger fasteners wasn't a high priority of this upgrade kit. But then again this kit is designed by Marlin and he only wants the best parts for your rig! Without compromise, the kit includes high shear and high tensile strength 12.9 grade cap bolts along with high quality serrated conical lock washers made in Germany.

Marlin Crawler Heavy Duty Rock Guard Lower Knuckle Cap

All Billet Steel parts along with their 25mm Chromoly pins are all made in USA. As you can see on the lower caps, we are quite proud of USA made parts!

Marlin Crawler Rock Guard Lower Knuckle Cap Ground Clearance

Another impressive feature of our Billet Rock Guard lower cap is how much ground clearance is gained. As shown to the left, ground clearance is cut by a massive 60%.

Put yourself in a rocks shoe: Would you rather hit an exposed single stud or go face-to-face with our Solid Billet Rock Guard lower cap?

Stop risking bent studs with damaged delicate and exposed threads. Switch over to our Heavy Duty Knuckle Bearing Upgrade today!

 

Take your Toyota Axle to the Ultimate Level with the
fully tested Marlin Crawler Knuckle Upgrade Kit!

 

Marlin Crawler XXRA Test Rig in Action Marlin Crawler XXRA Test Rig in Action

Marlin Crawler XXRA Test Rig in Action Marlin Crawler XXRA Test Rig in Action

Marlin Crawler XXRA Test Rig in Action Marlin Crawler XXRA Test Rig in Action

Marlin Crawler XXRA Test Rig in Action Marlin Crawler XXRA Test Rig in Action

Homegrown Racing's Tundra V8-powered Marlin Crawler Test Rig
(Some pictures copyright HIGHREV & Chad Jock photography)

Also available as a complete upgrade kit including our Billet High Steer Arms, as pictured below.

Marlin Crawler 25mm Knuckle Pin Upgrade Kit with High Steer Arms

Marlin Crawler 25mm Pin Inside