Iso-Marlboro FX3B

The was a Formula One car used by Frank Williams Racing Cars for the start of the 1973 Formula One Season. The car was a modified version of its predecessor the Politoys FX3 used by the team in . It was renamed to reflect new financial backing by Marlboro and the Italian sports car company Iso Autoveicoli. It was swiftly replaced by the Iso-Marlboro IR after only three races due to regulation changes.
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==Complete Formula One Results==
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!colspan=3|
|colspan=2|
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|rowspan=3|FX3B
|rowspan=3|
|align=left| Nanni Galli
|||9th|| || || || || || || || || || || || ||
!rowspan=3|2All points in were scored by Iso-Marlboro IR
!rowspan=3|10th
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|align=left| Howden Ganley
|||7th||10th|| || || || || || || || || || || ||
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|align=left| Jackie Pretorius
| || |||| || || || || || || || || || || ||
==References==
Category:Cars
Category:1973 Cars