Want to tighten up the diff on your 2021+ G8X M3/M4 and help eliminate any extra diff movement on hard launches? We got you covered with our Billet diff inserts. They are machined from 6061-T6, and anodized black for a long-lasting finish. They install easily by removing the diff bolts one at a time, inserting the bushing, and then retorquing each diff bolt. They are sold in 3 ways, front side only, rear side only, and Both front and rear side. Installing the Front side only requires less time, and labor, to install the rear, you must support the diff as you need to completely separate the flange from the supports
Kit includes:
- Optional 4 G8X Front Side Billet Diff bushing inserts
- Optional 4 G8X Rear Side Billet Diff bushing inserts
- Optional 4 12.9 M12 bolts, and hardened Washers
Please note: A slight increase in NVH may be noticed from this product as it stiffens up the rear end, and removes some of the sound dampening of the rubber bushings
