2003-2009 Toyota 4runner, FJ Cruiser 8″ Rear Axle with E locker Master install kit


If you have added larger tires or substantial weight to your 4th gen 4runner then you’ve landed in the right place!

This Nitro gear Package will help get your gas mileage and restore power back to factory!

Based on our experience and knowledge we recommend the following options dependent on tire size.

33″tires  = 4:10 ratio

35″ tires = 4:56 ratio

37″ tires = 4:88  ratio

  • Nitro Rings & Pinions:
  • 8620 Steel Gear Forgings
  • Precision Machining
  • CNC Triple-lapping
  • Heat Treatment
  • Rockwell Hardness Tested

Choose Gear Ratio * 

Nitro Gear Oil * 

Friction is a killer to your moving parts. Our Para-Synthetic Plus is engineered to reduce friction with superior lubrication. Studies show it reduces your operating temperatures by up to 35%* and reducing wear as much as 25%*. Less friction means better fuel economy. There’s nothing like it that will add miles to the adventure.

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