Asiatech
BMW
Bristol Cars Ltd.
BRM (British Racing Motors)
Butterworth
Cosworth Engineering
Coventry Climax Ltd.
Engine Developments Ltd.
Gurney Weslake
Honda Motor Company
Ilmor Engineering
Kuchen
Lamborghini Engineering SpA
Lancia
Lea-Francis
Matra Sports
Mecachrome SA
Megatron
Motori Moderni SpA
Mugen Company Ltd.
Officine Specializate Costruzione Automobili
Osella
Peugeot (PSA Peugeot Citroen)
Renault (Automobiles Renault)
Repco
Sauber
Sauber Petronas Engineering
Serenissima
Speluzzi
Supertec
TAG Turbo Engines
Toyota Motor Corporation
Veritas
Yamaha Motor
Zakspeed