HPI Cup Racer Front One Way Mods Shopping List

Here's the complete list to mod a TT-01 one way into the HPI Cup Racer. See part1, part2 and part3 for instructions. After running a pack, it's a fragile setup in that the diff gear can wander on the pressed bearing in a bearing jury rig. But, it drives so much better and the looks of the 510 are always great.

Boca Bearing

• 2x 3x10x15mm bearings
• 2x 3x6x10mm bearings
• Bench vice, or similar, to press the bearing into the bearing 
• (or 2x 3x6x15mm bearing, I couldn't find one)

Eagle Racing

• TT-01 one way diff unit 

HPI 

• Cup Racer ball diff bevel gear - use the stock one that's already in the car, you won't need a ball diff for drifting if you lock the gear diff in the rear

 
Dremel bits

• Grinding stones 
• 1x small drum grinding stone
• 1x tapered grinding stone
• Sanding Disks
• Drill bit, or small Dremel bit to hog out the ball diff hole

Safety bits

• Always wear safety goggles and a dust mask/bandana when grinding
• It's a good idea to wear gloves when using a Dremel (mechanics gloves are great)