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The main piece to the conversion puzzle to mount a Vaterra Twin Hammers front diff inside a Gen7 BPC chassis. This one is the top brace for the diff. It bolts to the chassis shock hoops, 2 holes in the diff, and one in the steering setup. It will also hold your servo.
You'll need one long counter sunk head M3 for the hole under the servo. The rest can be regular button head M3 screws. The ones for the diff are pretty long.