Strength and durability to ensure longer life. Get genuine performance from genuine Spicer. Spicer parts are designed, engineered, and manufactured to meet or exceed OE requirements, because they are OE parts, ensuring a perfect fit. That's why Spicer is the name you can trust for top performance and durability. Kits include everything needed to rebuild your carrier case and utilize net forged gears that are substantially stronger than other aftermarket cut gears.