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4.1cc/Composite Slide Carb./New Port Timing/Rear Exhaust/Pullstart/Includes Air Cleaner and Glow Plug (R5)

Parts List

Big Block Power for big trucks! The HPI Nitro Star F4.1 is the next evolutionary step up from the proven HPI Nitro Star S25 engine. It features a new crankcase and upgrades to the cylinder, piston, connecting rod and crankshaft.

The F4.1 engine delivers more power, more torque and extra cooling. It is especially design for the high power needs of a big 1/8th scale monster truck! Features:

  • Rear exhaust
  • ABC construction
  • Aggressive porting
  • Large, billet aluminium heatsink
  • Prepared for Roto System
  • Dual needle 7mm composite carb
  • Extra strong crank case
  • Purple anodised aluminium carb trim
Nitro Star F4.1 Engine Size: 4.1cm³ (0.25in³) Brake Horse Power (BHP): 2.75 Exhaust Position: Rear Starter: Pullstart (Op. Roto Start) Compatible HPI Kits: All Savages

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