Gibson GK428 engine

The Zytek GK428 engine is a 4.2-litre normally-aspirated DOHC V8 engine. It has been developed and produced by Gibson for sports car racing since 2017.^[4][5]

Gibson GK428[1][2][3]
Overview
Manufacturer	Gibson
Production	2017-present
Layout
Configuration	V8 naturally-aspirated, 90° cylinder angle
Displacement	4.2 L (256 cu in)
Valvetrain	DOHC
Combustion
Fuel system	Electronic indirect multi-point injection
Fuel type	Elf LMS 102 RON unleaded gasoline E10 ethanol
Output
Power output	603 hp (450 kW)
Torque output	410 lb⋅ft (556 N⋅m)
Dimensions
Dry weight	135 kg (298 lb)

Applications

• Dallara P217
• Ligier JS P217
• Oreca 07
• Riley-Multimatic MkXXX