It is better to get the Altezza LM Race car from the Altezza race (in yellow, red, blue trim etc.) then to go back and do the series over with the new Altezza LM. It is very easy to beat the normal Altezzas with the newly acquired Altezza LM. Then when you win that series get the Chaser instead (silver, red, blue) so basically you will end up doing to series twice and get 1 Altezza LM and one Chaser.