Nitro Gear Chrysler 4.88, All Nitro Gears are computer-controlled forgings, forged out of 8620 Steel, fully automated turning, Single pass cut, and then vacuum heat treated, the sum of these processes is the ultimate aftermarket gear. This is a high performance Quiet gear, perfect for any vehicle from Stock and beyond, it will handle the rigors of big tires or high horse power. There is not another aftermarket supplier that comes close to the quality that is offered by Nitro Gear and Axle. Comes backed with a 1 year warranty. Check our Tech section for more info on Nitro VS. The competition.