Show Discontinued Kits


4.1cm3/Carbu tiroir composite/Nouv. dis. sequentielle/Echap. arriere/Lanceur/Inclut filtre a air et bougie (R5)


Standard Parts | Optional Parts

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

Please see our Roto Start Compatibility Guide to find the right Roto Start system for this engine.

Download PDF instructions for #1408 (23.1 MB)

Kevin Murphy and Jason Maloney of CVR Global LLP and Kevin Brown of Kevin Brown Advisory Limited were appointed as Joint Administrators to manage the affairs, business, and assets of the Company on 1 April 2019.
All enquiries and correspondence should be addressed to the Joint Administrators at CVR Global LLP, 20 Furnival Street, London EC4A 1JQ or to Jake Beake at

The Joint Administrators act as agent of the Company without personal liability.

All Licensed Insolvency Practitioners of the Administrators' firm are authorised in the UK by the Institute of Chartered Accountants in England and Wales.

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