Hpi Racing 101588 Turbo Underhead (F3.5 Pro) HO Tracks Charge only with a LiPo-compatible

Charge only with a LiPo-compatible balance charger using the proper 3S settings

7cm Office measures: 4-1/8 x 3 x 1-5/8" 10

this direct-fit factory part restores clean

REQUIRES: Installation on motor shaft

Hpi Racing 101588 Turbo Underhead (F3.5 Pro) HO Tracks Charge only with a LiPo-compatibleHpi Racing 101588 Turbo Underhead (F3. 5 Pro) This is a genuine HPI Racing turbo underhead for the F3. 5 Pro engine. The underhead forms the combustion chamber geometry that the F3. 5 Pro's performance is built around, so a clean, undamaged underhead is essential for consistent power and tuning. If yours has been damaged or worn through many gallons of running, this factory replacement restores proper sealing and combustion. Fits the F3. 5 Pro and