Portland International 1989

Portland International Raceway 1989 Geoff Brabham Jan Lammers

Portland Intl Raceway | © 1989 David Allio

1989 July 30 | Sunday: Geoff Brabham (83) Electramotive Engineering Nissan GTP ZX-T races Jan Lammers/Price Cobb (60) Tom Walkinshaw Racing (TWR) Jaguar XJR-10 for the lead in the 12th Annual GI Joes Gran Prix IMSA Camel GTP event at Portland International Raceway in Portland, Oregon.

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