Gibson GK428 engine

History

Gibson Technology — the Repton firm carrying Zytek's engineering lineage — won the contract that defined modern LMP2: from 2017, the GK428 4.2-litre naturally aspirated V8 (~600 hp, later output-adjusted by regulation) became the class's sole engine worldwide — WEC, ELMS, IMSA's LMP2 and the Asian series all racing identical Gibson power, making the company the quiet constant behind every LMP2 battle of the era, with the sister GL458 serving the LMP1 privateer chapter.

The spec-engine economy Gibson operates is the story's substance: engines are supplied, sealed and rebuilt on mandated schedules through Gibson and its service network, parity is contractual, and teams' engine costs are known-in-advance line items — motorsport's engine business at its most industrialised.

Which defines the second-hand reality: GK428s exist inside the spec ecosystem — units trade with cars or through the rebuild network, value is almost purely hours-against-rebuild-schedule plus documentation, and ownership outside the support system (an unsealed engine without Gibson's ledger) is a display piece — the spec world's asset rules in their purest form.

Palmarès

Every LMP2 victory worldwide since 2017 — Le Mans class wins, WEC/ELMS/IMSA titles and the class's entire modern record — carried by one engine design as contractual monopoly; the GL458 sibling's LMP1 privateer wins beside it.