| 6.1.1958 | Taulud | | 750 Zagato | Soldi | | ?th |
| 6.1.1958 | Melbourne | | 750 Zagato | Grosso | | ?th |
| 12.1.1958 | Preliminary Miami [FP+GP+KP+HM] | 1 | 750 Zagato | Harry Fry | | 20th |
| 12.1.1958 | SCCA National Miami [FP+GP+KP+HM] | 1 | 750 Zagato | Harry Fry | | 16th |
| 8.2.1958 | Preliminary Pomona [Modified 1.0] | 73 | 750 Zagato | Perry Peron | Perry Peron | 7th |
| 9.2.1958 | Pomona [S1.5] | 73 | 750 Zagato | Perry Peron | Perry Peron | DNQ |
| 16.2.1958 | Preliminary New Smyrna Beach [FP+GP+HP+HM] | 1 | 750 Zagato | Harry Fry | | DNA |
| 16.2.1958 | SCCA Regional New Smyrna Beach [FP+GP+HP+HM] | 1 | 750 Zagato | Harry Fry | | DNS |
| 2.3.1958 | SCCA Regional Shelton [S1.5] | 211 | | George Keck | | raced |
| 9.3.1958 | Preliminary Boca Raton [FP+GP+HP+KP+HM] | 10 | 750 Zagato | Harry Fry | | ?th |
| 9.3.1958 | SCCA Regional Boca Raton [FP+GP+HP+KP+HM] | 10 | 750 Zagato | Harry Fry | | ?th |
| 16.3.1958 | Modena [GT750] | | Zagato | Erasmo Crivellari | Scuderia San Marco | 1st |
| 16.3.1958 | Modena [GT750] | | Zagato | "Etoile" | | 3rd |
| 16.3.1958 | Modena [GT750] | | Zagato | Arnaldo Cavalieri | | 2nd |
| 22.3.1958 | 12 h Sebring | 63 | 750 Zagato | Brumby / Aldhous / Martinez | Baron de Graffenreid | 30th |
| 22.3.1958 | 12 h Sebring | 64 | 750 Zagato | Kessinger / West / Thiele | Baron de Graffenreid | 31st |
| 22.3.1958 | 12 h Sebring | 65 | 750 Zagato | McCluggage / Levy | Alfred Momo | DNF |
| 22.3.1958 | 12 h Sebring | 80 | 750 Zagato | Fry / Rappaport | Dr. Harry Fry | 32nd |
| 7.4.1958 | 3 h Pau [GT750] | | Zagato | Elio Zagato | | 2nd |
| 13.4.1958 | SCCA Regional Palm Springs [FM+GM+HM] | 2 | | Hank Tubman | Hank Tubman | DNF |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 2 | | Hank Tubman | Hank Tubman | DNA |
| 13.4.1958 | SCCA Regional Palm Springs [FM+GM+HM] | 73 | 750 Zagato | Frank Aldhous | Frank Aldhous | 16th |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 73 | 750 Zagato | Frank Aldhous | Frank Aldhous | DNA |
| 19.4.1958 | Giro di Sicilia | 74 | 750 Vignale | | | raced |
| 19.4.1958 | Giro di Sicilia | | Zagato | Ernesto Prinoth | | 9th |
| 19.4.1958 | Giro di Sicilia | | Zagato | Vincenzo Arena | | 7th |
| 20.4.1958 | SCCA Regional Shelton [S1.5] | 211 | | George Keck | | raced |
| 27.4.1958 | GP Napoli [GT500] | | 500 GT Zagato | Argenti | | 1st |
| 27.4.1958 | GP Napoli [GT750] | | 750 Zagato | Lanzo Cussini | | 1st |
| 4.5.1958 | Asmara-Keren-Asmara | | 500 GT Zagato | Nardoni | | ?th |
| 11.5.1958 | Hawaii [S1.6] | 63 | 750 Zagato | Frank Aldhous | | 13th |
| 18.5.1958 | SCCA National Cumberland [GP+HP] | 8 | Zagato | Brad Howes | Elmer Wolf | DNA |
| 18.5.1958 | SCCA National Cumberland [GM+HM] | 8 | Zagato | Brad Howes | Elmer Wolf | ?th |
| 18.5.1958 | SCCA Regional Shelton [S1.5] | 123 | | George Keck | | raced |
| 25.5.1958 | GP des Frontières [GT2.0+TS1.0] | | 750 Zagato | Armand Blary | | 8th |
| 31.5.1958 | Preliminary Santa Barbara [Modified 1.0] | 63 | 750 Zagato | Aldhous / Gibler | Jack Brumby | DNA |
| 31.5.1958 | Preliminary Santa Barbara [Modified 1.0] | 73 | 750 Zagato | Perry Peron | Perry Peron | raced |
| 31.5.1958 | Preliminary Bridgehampton [GT] | 81 | Zagato | Brad Howes | | 8th |
| 31.5.1958 | ICNSCC Deer Park [Production 1.5] | 123 | | George Keck | | 7th |
| 31.5.1958 | ICNSCC Deer Park [Modified] | 123 | | George Keck | | raced |
| 1.6.1958 | Santa Barbara [FM+GM+HM] | 63 | 750 Zagato | Frank Aldhous | Jack Brumby | 18th |
| 1.6.1958 | Santa Barbara [FM+GM+HM] | 73 | 750 Zagato | Perry Peron | Perry Peron | DNS |
| 1.6.1958 | SCCA National Bridgehampton [GP+HP+HM] | 81 | Zagato | Brad Howes | | 11th |
| 15.6.1958 | Preliminary Laguna Seca [HM+Production I] | 183 | Zagato | Jean Pierre Kunstle | | ?th |
| 21.6.1958 | ADMC Crimond [Production Handicap] | 12 | | Richard Shepherd-Barron | R. M. Shepherd-Barron | ?th |
| 22.6.1958 | Vallelunga [GT750] | | 750 Zagato | Vittorio Feroldi de Rosa | | 1st |
| 22.6.1958 | Vallelunga [GT750] | | | Silvio Mandato | | 4th |
| 22.6.1958 | Vallelunga [GT500] | | Zagato | D'Alessandro | | raced |
| 22.6.1958 | Vallelunga [GT500] | | 500 GT Zagato | Luigi Argenti | | 1st |
| 22.6.1958 | Vallelunga [GT750] | | 750 Zagato | Lanzo Cussini | | 3rd |
| 22.6.1958 | Vallelunga [GT500] | | Zagato | Ovidio Capelli | | 2nd |
| 22.6.1958 | Vallelunga [GT500] | | | Giovanni Bellochio | | 5th |
| 22.6.1958 | Coppa Lomellina | | 750 Zagato | Bottacchi | | ?th |
| 22.6.1958 | Vallelunga [GT750] | | 750 Zagato | Alfonso Thiele | | 2nd |
| 29.6.1958 | Riverside [FM+GM+HM] | 73 | 750 Zagato | Perry Peron | | 11th |
| 29.6.1958 | SCCA Regional Shelton [S1.5] | 123 | | George Keck | | raced |
| 5.7.1958 | Novice Vaca Valley [Modified] | 74 | 750 Zagato | John Nelson | John Nelson, Jr. | DNA |
| 20.7.1958 | SCCA Regional Thompson [GT] | 26 | 750 GT Zagato | Paul Sagan | | 6th |
| 20.7.1958 | SCCA Regional Thompson [GM+HM+HP] | 27 | 750 GT Zagato | Paul Sagan | | 6th |
| 26.7.1958 | MCMC Oulton Park [Closed] | 87 | | D. Graham | P. Thompson | DNA |
| 3.8.1958 | SCCA Regional Shelton [S1.5] | 21 | | Dwight Goffinet | | DNA |
| 3.8.1958 | SCCA Regional Shelton [PS1.5] | 21 | | Dwight Goffinet | | DNA |
| 3.8.1958 | SCCA Regional Minden [FM+GM+HM] | 74 | | John Nelson | John E. Nelson | DNA |
| 3.8.1958 | SCCA Regional Shelton [S1.5] | 123 | | George Keck | | raced |
| 3.8.1958 | SCCA Regional Shelton [PS1.5] | 123 | | George Keck | | raced |
| 3.8.1958 | SCCA Regional Shelton [PS1.5] | 199 | | Jim Warsinske | | DNA |
| 3.8.1958 | SCCA Regional Shelton [S1.5] | 199 | | Jim Warsinske | | DNA |
| 3.8.1958 | Giro delle Calabria | | 750 Zagato | Vittorio Feroldi de Rosa | | 13th |
| 3.8.1958 | Giro delle Calabria | | 750 Zagato | Lanzo Cussini | | 14th |
| 3.8.1958 | Giro delle Calabria | | 500 GT Zagato | Capelli | | ?th |
| 16.8.1958 | SCCA National Milwaukee [FP+GP+HM] | 82 | | Walter Short | | 19th |
| 17.8.1958 | Zeltweg [GT1.3] | 57 | 750 Zagato | Ermanno Gonella | Racing Club 19 | DNA |
| 17.8.1958 | Zeltweg [GT1.3] | 58 | Zagato | Ernesto Prinoth | Ernesto Prinoth | DNA |
| 17.8.1958 | Zeltweg [GT1.3] | 60 | | W. Charles Lier | Ecurie Les Mordus | DNA |
| 17.8.1958 | Zeltweg [GT1.3] | 61 | Zagato | Mario Poltronieri | Scuderia Sant Ambroeus | DNA |
| 30.8.1958 | Preliminary Santa Barbara [GP+HP] | 174 | 750 Zagato | John Nelson | | 3rd |
| 31.8.1958 | Santa Barbara [GP+HP] | 174 | 750 Zagato | John Nelson | | 6th |
| 31.8.1958 | Deer Park [FP+GP+HP+IP] | | | Jim Wasinske | | DNF |
| 6.9.1958 | SCCA National Road America [FP+GP+HM] | 82 | | Walter Short | | 16th |
| 7.9.1958 | GP Leopoldville | 6 | 750 Zagato | Alberto Grosso | | DNF |
| 7.9.1958 | GP Leopoldville | 15 | | Coreiro | | DNF |
| 7.9.1958 | SCCA Regional Shelton [S1.5] | 123 | | George Keck | | raced |
| 7.9.1958 | Coppa Inter-Europa [GT750] | | 750 Zagato | Alfonso Thiele | | 2nd |