| 8.6.1958 | SCCA Regional Eagle Mountain [race 7] | 14 | Giulietta | Ken Kendall | | raced |
| 8.6.1958 | SCCA Regional Thompson [FP+GP+HM+Sedan] | 20 | Giulietta Sprint Veloce | George Fogg | | 1st |
| 8.6.1958 | SCCA Regional Thompson [FP+GP+HM+Sedan] | 71 | Giulietta Veloce | John Clapp | | DNF |
| 8.6.1958 | SCCA Regional Thompson [FP+GP+HM+Sedan] | 72 | Giulietta Veloce | David Schiff | | 3rd |
| 8.6.1958 | SCCA Regional Eagle Mountain [race 4] | | Giulietta Spider Veloce | Bill Hughes | | 2nd |
| 8.6.1958 | SCCA Regional Eagle Mountain [race 4] | | Giulietta Veloce | Jerry Morton | | 1st |
| 8.6.1958 | SCCA Regional Eagle Mountain [race 7] | | Giulietta Veloce | Jerry Morton | | 1st |
| 8.6.1958 | SCCA Regional Eagle Mountain [race 7] | | Giulietta Spider Veloce | Bill Hughes | | 2nd |
| 14.6.1958 | SCCA National Lime Rock [GP+HP+HM] | 3 | Giulietta Spider Veloce | Ray Anderson | | DNF |
| 14.6.1958 | SCCA National Lime Rock [GP+HP+HM] | 5 | Giulietta Veloce | Norman Webb | | 9th |
| 14.6.1958 | SCCA National Lime Rock [GP+HP+HM] | 9 | Giulietta Veloce | Bob Grossman | | DNF |
| 14.6.1958 | SCCA National Lime Rock [GP+HP+HM] | 10 | Giulietta Sprint Veloce | George Fogg | | 2nd |
| 14.6.1958 | Preliminary Lime Rock [GT] | 10 | Giulietta Sprint Veloce | George Fogg | | 7th |
| 14.6.1958 | SCCA National Lime Rock [GP+HP+HM] | 22 | Giulietta Veloce | Louis Comito | | 8th |
| 14.6.1958 | SCCA National Lime Rock [GP+HP+HM] | 71 | Giulietta Spider Veloce | John Clapp | | 1st |
| 14.6.1958 | SCCA National Lime Rock [GP+HP+HM] | 82 | Giulietta Veloce | Barry Budlong | | 3rd |
| 14.6.1958 | Preliminary Lime Rock [GT] | 89 | Giulietta Sprint | David Knott | | 8th |
| 14.6.1958 | SCCA National Lime Rock [GP+HP+HM] | 89 | Giulietta Sprint | David Knott | | 6th |
| 14.6.1958 | SCCA National Lime Rock [GP+HP+HM] | 130 | Giulietta Sprint | Art Tweedale | | 7th |
| 14.6.1958 | SCCA National Lime Rock [GP+HP+HM] | 179 | Giulietta Spider Veloce | Tony Briggs | | DNF |
| 15.6.1958 | SCCA Regional Laguna Seca [FP+GP] | 8 | Giulietta Spider Veloce | Ron Hathaway | | 15th |
| 15.6.1958 | SCCA National Lime Rock [BM+CM+DM+EM+FM] | 26 | 1900 C52 Disco Volante | George Fogg | | DNF |
| 15.6.1958 | SCCA Regional Laguna Seca [FP+GP] | 38 | Giulietta Spider Veloce | Marion Lowe | | 17th |
| 15.6.1958 | SCCA Regional Laguna Seca [FP+GP] | 41 | Giulietta Veloce | Jack Dalton | | 13th |
| 15.6.1958 | SCCA Regional Laguna Seca [FP+GP] | 114 | Giulietta | Bob Lyons | | 27th |
| 15.6.1958 | SCCA Regional Laguna Seca [FP+GP] | 118 | Giulietta Veloce | Jean Pierre Kunstle | | 7th |
| 15.6.1958 | SCCA Regional Laguna Seca [FP+GP] | 126 | Giulietta Veloce | Willie West | | 11th |
| 15.6.1958 | Preliminary Laguna Seca [Production II] | 126 | Giulietta Veloce | Willie West | | 6th |
| 15.6.1958 | SCCA Regional Laguna Seca [FP+GP] | 147 | Giulietta | Robert Phillips | | 21st |
| 15.6.1958 | Opatija [GT1.3] | | Giulietta Veloce | Sepp Liebl | | 1st |
| 15.6.1958 | Opatija [GT1.3] | | Giulietta Veloce | M. Rodica | | 3rd |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 1 | Giulietta | Chuck Stoddard | Charles Stoddard | DNA |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 2 | Giulietta | Robert Bowers | Robert Bowers | DNA |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 3 | Giulietta Veloce | Ready Davis | Ready Davis | DNF |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 11 | Giulietta | H. J. Holcombe | H. J. Holcombe | 20th |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 25 | Giulietta | Brooks Robinson | Brooks Robinson | 7th |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 35 | Giulietta Veloce | Clint Lindburg | A. Clinton Lindburg | 4th |
| 22.6.1958 | 24 h Le Mans | 36 | Giulietta Sprint Veloce Zagato | Catulle / Ubezzi | Virgilio Conrero | DNF |
| 22.6.1958 | 24 h Le Mans | 37 | Giulietta Sprint Veloce Zagato | Lauga / Hébert | Virgilio Conrero | DNF |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 37 | Giulietta Spider Veloce | Richard Gaard | Dr. Richard Gaard | 10th |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 46 | Giulietta | Joel Jacobs | Joel Jacobs | DNA |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 66 | Giulietta | H. M. Tardif | Dr. H. M. Tardif | 13th |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 71 | Giulietta | George Ranney | George E. Ranney | 15th |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 74 | Giulietta Veloce | Harlan Schwartz | Harlan A. Schwartz | 6th |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 78 | Giulietta | Clif Bridge | Al Allin | DNF |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 79 | Giulietta Veloce | Harold Kihn | Harold Kihn | 8th |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 87 | Giulietta Super Spider | Ernst Ruffini | Ernst Ruffini | DNF |
| 22.6.1958 | SCCA National Road America [FP+GP+HP+HM] | 99 | Giulietta | Tom Newcomer | E. Tom Newcomer | 29th |
| 22.6.1958 | Vallelunga [GT1.3] | | Giulietta Veloce | "Kim" | | 2nd |
| 22.6.1958 | Vallelunga [GT1.3] | | Giulietta Sprint Veloce Zagato | Ada Pace | | 3rd |
| 22.6.1958 | Vallelunga [GT1.3] | | Giulietta Veloce | "Lucky" | | 4th |
| 22.6.1958 | Vallelunga [GT1.3] | | Giulietta Veloce | "Galeno" | | 5th |
| 22.6.1958 | Circuito di Caserta [S2.0] | | | Pietro Fiordelisi | | 9th |
| 22.6.1958 | Vallelunga [GT1.3] | | Giulietta Veloce | Casimiro Toselli | | 1st |
| 26.6.1958 | Preliminary Watkins Glen [Ladies] | 82 | Giulietta Veloce | Beulah Bailey | Barry Budlong, Jr. | 3rd |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 6 | Giulietta Veloce | David Schiff | David T. Schiff | 3rd |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 14 | Giulietta Veloce | David Elder | David Elder | 8th |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 15 | Giulietta Veloce | Norman Webb | Norman H. Webb | 7th |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 22 | Giulietta Veloce | Ken Long | Kenneth P. Long | 13th |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 40 | Giulietta Veloce | Ray Bloomer | Raymond Bloomer | 5th |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 69 | Giulietta Veloce | Ernst Scheeder | Ernst W. Scheeder | 9th |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 82 | Giulietta Veloce | Barry Budlong | Barry Budlong, Jr. | 2nd |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 106 | Giulietta Veloce | Ernest Browning | | 19th |
| 27.6.1958 | SCCA Regional Watkins Glen [FP+GP+Sedan] | 171 | Giulietta | Dennis Collins | Dennis G. Collins | DNA |
| 28.6.1958 | Preliminary Riverside [Novice] | 194 | Giulietta | James Crank | | 3rd |
| 29.6.1958 | Riverside [FP+GP] | 63 | Giulietta Veloce | Willie West | | 9th |
| 29.6.1958 | Riverside [FP+GP] | 115 | Giulietta Veloce | Frank Aldhous | | 5th |
| 29.6.1958 | Riverside [FP+GP] | 120 | Giulietta Veloce | Klaus Bythiner | | 10th |
| 29.6.1958 | Riverside [FP+GP] | 194 | Giulietta | James Crank | | 6th |
| 29.6.1958 | St. Eugene [Formula Libre] | | | Alvin Morrison | | 3rd |
| 4.7.1958 | Orange County [Production 1.6] | | Giulietta | Hanis Travers | | 1st |
| 4.7.1958 | Orange County [S1.5] | | Giulietta | Hanis Travers | | 3rd |
| 4.7.1958 | Orange County [Production 1.6] | | Giulietta | John Cooper | | 2nd |
| 5.7.1958 | Preliminary Vaca Valley [TR+Morgan+AH+Veloce+Super] | 8 | Giulietta Spider Veloce | Ron Hathaway | Ron Hathaway | DNA |
| 5.7.1958 | SCCA National Lime Rock [GP+HP+HM] | 9 | Giulietta Veloce | Bob Grossman | | 4th |
| 5.7.1958 | SCCA National Lime Rock [GP+HP+HM] | 20 | Giulietta Sprint Veloce | George Fogg | | 3rd |
| 5.7.1958 | SCCA National Lime Rock [GP+HP+HM] | 21 | Giulietta Veloce | Allen Markelson | | 6th |
| 5.7.1958 | SCCA National Lime Rock [GP+HP+HM] | 32 | Giulietta Veloce | Ray Anderson | | 1st |
| 5.7.1958 | Preliminary Vaca Valley [TR+Morgan+AH+Veloce+Super] | 38 | Giulietta Spider Veloce | Marion Lowe | Marion Lowe | DNA |
| 5.7.1958 | SCCA National Lime Rock [GP+HP+HM] | 40 | Giulietta Veloce | Ray Bloomer | | DNF |
| 5.7.1958 | Preliminary Vaca Valley [TR+Morgan+AH+Veloce+Super] | 41 | Giulietta Veloce | Ed Crooks | Ed Crooks | DNA |
| 5.7.1958 | SCCA National Lime Rock [GP+HP+HM] | 47 | Giulietta Veloce | Hal Dougherty | | 15th |
| 5.7.1958 | SCCA National Lime Rock [GP+HP+HM] | 71 | Giulietta Veloce | John Clapp | | 2nd |
| 5.7.1958 | SCCA National Lime Rock [GP+HP+HM] | 78 | Giulietta Veloce | Norman Webb | | DNF |
| 5.7.1958 | SCCA National Lime Rock [GP+HP+HM] | 82 | Giulietta Veloce | Barry Budlong | | 5th |
| 5.7.1958 | SCCA National Lime Rock [GP+HP+HM] | 83 | Giulietta Veloce | Malcolm Donaldson | | 12th |
| 5.7.1958 | LASC Green Acres [S1.5] | 105 | Giulietta | Joe Diamond | | 7th |
| 5.7.1958 | Preliminary Vaca Valley [Alfa+MGA+356] | 114 | Giulietta | Bob Lyons | Bob Lyons | DNA |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 114 | Giulietta Veloce | Wyn Robertson | Robert Lyons | DNA |
| 5.7.1958 | SCCA National Lime Rock [GP+HP+HM] | 137 | Giulietta Veloce | Stuart Shepp | | 8th |
| 5.7.1958 | Preliminary Vaca Valley [TR+Morgan+AH+Veloce+Super] | 148 | Giulietta Veloce | Steve Froines | Steve Froines | DNA |
| 5.7.1958 | Novice Vaca Valley [Production 1.6] | 161 | Giulietta | Tom Handley | Tom Handley | DNA |
| 5.7.1958 | SCCA National Lime Rock [GP+HP+HM] | 161 | Giulietta Veloce | Jim Silberman | | 7th |
| 5.7.1958 | Preliminary Vaca Valley [TR+Morgan+AH+Veloce+Super] | 166 | Giulietta Veloce | Willam Cook | Willam Cook | DNA |
| 5.7.1958 | 12 h Reims | | Giulietta | Ubezzi / Catulle | | ?th |
| 6.7.1958 | Västkustloppet [GT1.6] | 7 | Giulietta Veloce | Bo Elmhorn | | 6th |
| 6.7.1958 | Västkustloppet [GT1.6] | 8 | Giulietta Veloce | Olle Rehnvall | | 8th |
| 6.7.1958 | Hammond [Production 1.5+TR3+HM] | 171 | Giulietta Spider Veloce | Bill Hughes | | 1st |
| 6.7.1958 | Hammond [Production 1.6+MGA+HM] | 171 | Giulietta Spider Veloce | Bill Hughes | | 1st |
| 6.7.1958 | SCCA Regional Minneapolis [Production 1.6] | | Giulietta Spider Veloce | Richard Gaard | | 1st |