This is a Traxxas High Stall Clutch Set for the Traxxas T-Maxx .15, 2.5, 3.3, Revo 2.5 and 3.3 trucks. A higher stall lets you rev the engine up higher before the clutch engages, for more power when you are taking off.

This is a Traxxas 30mm Flywheel with Pins for the Jato 2.5 and 3.3 trucks.