If you're looking to boost the performance of your Z or G and improve acceleration by means other than horsepower, a higher final drive ratio is the easiest way to achieve your goal!

The improvement in acceleration and responsiveness is by far the most noticeable when simply changing your car's differential ratio. By altering the input and output ratios of the crown and pinion, the car is able to accelerate more quickly in each gear. The 3.91 Final Drive OEM is a direct replacement for the original crown and pinion, is compatible with all rear-wheel-drive manual transmission differentials, and is available at a fraction of the cost of the original gear sets.

Replacement bearings are required to install a new final drive in your differential. With the available product options, you can choose to purchase all the necessary bearings and seals for your differential.

CONTENTS OF THE BEARING ASSEMBLY (OPTIONAL):
-2x Genuine Nissan differential support bearings
-2x Genuine Nissan differential side oil seals
-1x Genuine Nissan "rear" inner pinion bearing
-1x Genuine Nissan pinion crushing sleeve
-1x Genuine Nissan "front" outer pinion bearing
-1x Genuine Nissan pinion oil seal
-1x Permatex Ultra Gray Sealant

**COMPATIBLE WITH MANUAL DIFFERENTIALS ONLY**