| 18.5.1958 | SCCA National Cumberland [GP+HP] | 128 | | Norman Webb | Norman H. Webb, Jr. | DNA |
| 18.5.1958 | SCCA National Cumberland [GP+HP] | 131 | | Gerald Zucker | Gerald Zucker | DNA |
| 18.5.1958 | SCCA National Cumberland [GP+HP] | 138 | Giulietta Veloce | Art Tweedale | Continental Motors, Lts. | 5th |
| 18.5.1958 | SCCA National Cumberland [GP+HP] | 171 | | William W. Krauss | William W. Krauss | DNA |
| 18.5.1958 | LISCA Lime Rock [GP] | | Giulietta Veloce | Louis Comito | | 2nd |
| 18.5.1958 | LISCA Lime Rock [GP] | | Giulietta Veloce | Ray Anderson | | 1st |
| 18.5.1958 | LISCA Lime Rock [GP] | | Giulietta Veloce | Ray Bloomer | | 3rd |
| 25.5.1958 | Hourglass Field [Production 1.6] | | Giulietta | Chuck Charles | | 3rd |
| 25.5.1958 | Hourglass Field [Production 1.6] | | Giulietta | John Cooper | | 2nd |
| 25.5.1958 | Hourglass Field [Ladies] | | Giulietta | Nancy McCullough | | DNA |
| 25.5.1958 | GP des Frontières [GT2.0+TS1.0] | | Giulietta Veloce | Eric Catulle | | 1st |
| 25.5.1958 | GP des Frontières [GT2.0+TS1.0] | | Giulietta Veloce | Jacques Croisier | | 2nd |
| 25.5.1958 | GP des Frontières [GT2.0+TS1.0] | | Giulietta Veloce | Demol | | 12th |
| 25.5.1958 | Hourglass Field [Production 1.6] | | Giulietta | John R. Webb | | 1st |
| 25.5.1958 | Hourglass Field [Ladies] | | Giulietta Sprint | Gwen Charles | | DNA |
| 31.5.1958 | Novice Dunkirk [EP+FP+GP] | 8 | Giulietta | Ernst Scheeder | | 9th |
| 31.5.1958 | Preliminary Santa Barbara [GP+HP] | 13 | Giulietta Veloce | Hank Tubman | Henry (Hank) Tubman | DNA |
| 31.5.1958 | Preliminary Bridgehampton [GT] | 19 | Giulietta Veloce | David Knott | | 5th |
| 31.5.1958 | Novice Dunkirk [EP+FP+GP] | 20 | Giulietta Veloce | David Schiff | | DNA |
| 31.5.1958 | Preliminary La Junta [Production+HM] | 28 | Giulietta Spider Veloce | Louis Plummer | | 14th |
| 31.5.1958 | Novice Dunkirk [EP+FP+GP] | 37 | Giulietta | Stuart Shepp | | 11th |
| 31.5.1958 | Novice Dunkirk [EP+FP+GP] | 41 | Giulietta Veloce | Jim Fitzgerald | | 1st |
| 31.5.1958 | Preliminary Santa Barbara [GP+HP] | 41 | Giulietta Veloce | Ed Crooks | Ed Crooks | DNA |
| 31.5.1958 | Novice Dunkirk [EP+FP+GP] | 45 | Giulietta Veloce | John H. Campbell | | DNA |
| 31.5.1958 | Novice Dunkirk [EP+FP+GP] | 53 | Giulietta Veloce | Ken Long | | 12th |
| 31.5.1958 | Novice Dunkirk [EP+FP+GP] | 92 | Giulietta Veloce | Lou Lappa | | 3rd |
| 31.5.1958 | Preliminary Santa Barbara [GP+HP] | 96 | Giulietta Veloce | Tom Handley | T. H. Standley | DNA |
| 31.5.1958 | Preliminary Santa Barbara [GP+HP] | 111 | Giulietta | Martin Hosch | Martin Hosch | DNA |
| 31.5.1958 | Preliminary Santa Barbara [GP+HP] | 115 | Giulietta Veloce | Frank Aldhous | Frank Aldhous | DNA |
| 31.5.1958 | Preliminary Santa Barbara [GP+HP] | 197 | Giulietta Veloce | Mike Roetnor | Michael Roetnor | DNA |
| 31.5.1958 | Preliminary Santa Barbara [Ladies] | 241 | Givil Special | Maureen Lee | Eugene Lee | DNA |
| 31.5.1958 | Preliminary Santa Barbara [GP+HP] | 241 | Givil Special | Eugene Lee | Eugene Lee | DNA |
| 31.5.1958 | Preliminary Santa Barbara [GP+HP] | 263 | Giulietta Veloce | Willie West | Willie West | DNA |
| 1.6.1958 | SCCA National Bridgehampton [GP+HP+HM] | 3 | Giulietta Veloce | Ray Anderson | | 4th |
| 1.6.1958 | SCCA Regional Dunkirk [FP+GP] | 8 | Giulietta | Ernst Scheeder | | 11th |
| 1.6.1958 | SCCA Regional Dunkirk [FP+GP] | 9 | Giulietta Veloce | Chuck Stoddard | | 3rd |
| 1.6.1958 | SCCA National Bridgehampton [GP+HP+HM] | 9 | Giulietta Veloce | Bob Grossman | | 1st |
| 1.6.1958 | GP Dunkirk | 9 | Giulietta | Chuck Stoddard | | 12th |
| 1.6.1958 | Santa Barbara [EP+FP+JP] | 13 | Giulietta Veloce | Hank Tubman | Henry (Hank) Tubman | 18th |
| 1.6.1958 | SCCA Regional Dunkirk [FP+GP] | 14 | Giulietta Veloce | David Elder | | 4th |
| 1.6.1958 | SCCA Regional Dunkirk [FP+GP] | 16 | Giulietta | Norman Webb | | 10th |
| 1.6.1958 | SCCA National Bridgehampton [GP+HP+HM] | 19 | Giulietta | David Knott | | 6th |
| 1.6.1958 | SCCA National Bridgehampton [GP+HP+HM] | 21 | Giulietta Veloce | Allen Markelson | | 3rd |
| 1.6.1958 | SCCA Regional La Junta [FM+GM+HM+EP+FP+GP] | 28 | Giulietta Spider Veloce | Louis Plummer | | 21st |
| 1.6.1958 | SCCA Regional Dunkirk [FP+GP] | 37 | Giulietta | Stuart Shepp | | 12th |
| 1.6.1958 | SCCA Regional Dunkirk [FP+GP] | 41 | Giulietta Veloce | Jim Fitzgerald | | 5th |
| 1.6.1958 | Santa Barbara [EP+FP+JP] | 41 | Giulietta Veloce | Bob Winkelmann | Ed Crooks | 14th |
| 1.6.1958 | GP Dunkirk | 45 | Giulietta Veloce | John H. Campbell | | 10th |
| 1.6.1958 | SCCA Regional Dunkirk [FP+GP] | 45 | Giulietta Veloce | John H. Campbell | | 7th |
| 1.6.1958 | SCCA National Bridgehampton [BM+CM+DM+EM+FM] | 50 | 1900 C52 Disco Volante | Richard Kessler | | 7th |
| 1.6.1958 | SCCA Regional La Junta [FM+GM+HM+EP+FP+GP] | 54 | Giulietta Veloce | John Max Wolf | Bea Lara | 7th |
| 1.6.1958 | 1000 km Nürburgring | 71 | Giulietta Sprint Veloce | Ahrens / Trenkel | Kurt Ahrens | 29th |
| 1.6.1958 | 1000 km Nürburgring | 72 | Giulietta Veloce | Friederichs / Moser | Heinz Friederichs | DNF |
| 1.6.1958 | 1000 km Nürburgring | 73 | Giulietta Sprint Veloce | Stern / Vogel | Ecurie Le Maute | 20th |
| 1.6.1958 | 1000 km Nürburgring | 74 | Giulietta Veloce | Kropf / Heuer | Ecurie Biennoise | 32nd |
| 1.6.1958 | 1000 km Nürburgring | 75 | Giulietta Sprint Veloce | Foitek / Sommacal | Karl Foitek | DNF |
| 1.6.1958 | 1000 km Nürburgring | 76 | Giulietta Veloce | Nogueira Pinto / Cabral | Manuel Nogueria Pinto | 21st |
| 1.6.1958 | 1000 km Nürburgring | 77 | Giulietta Veloce | Liebl / Schultze | Sepp Liebl | 23rd |
| 1.6.1958 | 1000 km Nürburgring | 78 | Giulietta Veloce | Hezemans / Oebels | Mathieu Hezemans | DNF |
| 1.6.1958 | SCCA Regional La Junta [FM+GM+HM+EP+FP+GP] | 80 | Giulietta | Ron Hunter | | 20th |
| 1.6.1958 | 1000 km Nürburgring | 81 | Giulietta Veloce | Estler / Hespen | Horst Estler | 28th |
| 1.6.1958 | GP Dunkirk | 82 | Giulietta | Barry Budlong | | 13th |
| 1.6.1958 | 1000 km Nürburgring | 82 | Giulietta Veloce | Kronegard / Bielke | Harald Kronegaard | DNS |
| 1.6.1958 | SCCA Regional Dunkirk [Ladies] | 82 | Giulietta Veloce | Beulah Bailey | | 3rd |
| 1.6.1958 | SCCA Regional Dunkirk [FP+GP] | 82 | Giulietta Spider Veloce | Barry Budlong | | 1st |
| 1.6.1958 | SCCA Regional Dunkirk [FP+GP] | 92 | Giulietta Veloce | Lou Lappa | | DNF |
| 1.6.1958 | Santa Barbara [EP+FP+JP] | 96 | Giulietta Veloce | Tom Handley | T. H. Standley | 23rd |
| 1.6.1958 | Santa Barbara [EP+FP+JP] | 111 | Giulietta | Martin Hosch | Martin Hosch | 25th |
| 1.6.1958 | Santa Barbara [EP+FP+JP] | 115 | Giulietta Veloce | Frank Aldhous | Frank Aldhous | 11th |
| 1.6.1958 | SCCA National Bridgehampton [GP+HP+HM] | 117 | Giulietta Veloce | Bart Levenson | | 2nd |
| 1.6.1958 | SCCA National Bridgehampton [GP+HP+HM] | 122 | Giulietta Veloce | Louis Comito | | 10th |
| 1.6.1958 | SCCA Regional Dunkirk [FP+GP] | 131 | Giulietta Veloce | Gerald Zucker | | DNF |
| 1.6.1958 | Santa Barbara [EP+FP+JP] | 197 | Giulietta Veloce | Mike Roetnor | Michael Roetnor | 12th |
| 1.6.1958 | Santa Barbara [Ladies] | 241 | Givil Special | Maureen Lee | Eugene Lee | DNA |
| 1.6.1958 | Santa Barbara [EP+FP+JP] | 241 | Givil Special | Eugene Lee | Eugene Lee | 20th |
| 1.6.1958 | Santa Barbara [EP+FP+JP] | 263 | Giulietta Veloce | Willie West | Willie West | 10th |
| 1.6.1958 | 1000 km Nürburgring | | Giulietta Veloce | Joachim Springer | Joachim Springer | DNA |
| 1.6.1958 | La Junta [Ladies] | | Giulietta Veloce | Ben Lara | | 2nd |
| 7.6.1958 | Put-In-Bay [GP+HP] | 8 | | Ivan Trofimov | | DNA |
| 7.6.1958 | Put-In-Bay [GP+HP] | 25 | | Chuck Stoddard | | DNA |
| 7.6.1958 | Put-In-Bay [GP+HP] | 33 | Giulietta | Norris Hartshorn | | DNA |
| 7.6.1958 | Put-In-Bay [GP+HP] | 46 | | Joe Diamond | | DNA |
| 7.6.1958 | Put-In-Bay [GP+HP] | 56 | | William Bradley | | DNA |
| 7.6.1958 | Put-In-Bay [GP+HP] | 63 | | L. D. Morrissett, Jr. | | DNA |
| 7.6.1958 | Put-In-Bay [GP+HP] | 77 | Giulietta Spider | Richard Cremer | | DNA |
| 7.6.1958 | Put-In-Bay [GP+HP] | 78 | | Al Allin | | DNA |
| 7.6.1958 | Put-In-Bay [GP+HP] | 84 | Giulietta Spider | Harry Constant | | DNA |
| 7.6.1958 | Put-In-Bay [GP+HP] | 92 | Giulietta | Bill Malion | | DNA |
| 8.6.1958 | SCCA Regional Thompson [FP+GP+HM+Sedan] | 4 | Giulietta Veloce | Bob Grossman | | DNA |
| 8.6.1958 | Preliminary Lawrenceville [FP+GP+HM] | 12 | Giulietta | Ted Baumgartner | | ?th |
| 8.6.1958 | SCCA Regional Lawrenceville [FP+GP+HM] | 12 | Giulietta | Ted Baumgartner | | ?th |
| 8.6.1958 | SCCA Regional Lawrenceville [FP+GP+HM] | 31 | Giulietta | Lee Hall | | ?th |
| 8.6.1958 | Preliminary Lawrenceville [FP+GP+HM] | 31 | Giulietta | Lee Hall | | ?th |
| 8.6.1958 | SCCA Regional Thompson [FP+GP+HM+Sedan] | 35 | Giulietta | Jeffrey Hsu | | 4th |
| 8.6.1958 | Preliminary Lawrenceville [FP+GP+HM] | 35 | Giulietta Veloce | Clint Lindburg | | ?th |
| 8.6.1958 | SCCA Regional Lawrenceville [FP+GP+HM] | 35 | Giulietta Veloce | Clint Lindburg | | ?th |
| 8.6.1958 | SCCA Regional Thompson [FP+GP+HM+Sedan] | 70 | Giulietta | Ken Long | | DNA |
| 8.6.1958 | Preliminary Lawrenceville [FP+GP+HM] | 74 | Giulietta | Marilyn Taylor | | ?th |
| 8.6.1958 | SCCA Regional Lawrenceville [FP+GP+HM] | 74 | Giulietta | Marilyn Taylor | | ?th |
| 8.6.1958 | Preliminary Lawrenceville [FP+GP+HM] | 84 | Giulietta | George Cheyne | | 4th |