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

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

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

BEARING SET CONTENTS (OPTIONAL):
-2x Genuine Nissan Differential Carrier Bearings
-2x Genuine Nissan Differential Side Oil Seals
-1x Genuine Nissan "Rear" Inner Pinion Bearing
-1x Genuine Nissan Pinion Crush Socket
-1x Genuine Nissan "front" outer pinion bearing
-1x Genuine Nissan Pinion Oil Seal
-1x Permatex Ultra Gray Sealant

**COMPATIBLE WITH MANUAL DIFFERENTIALS ONLY**