| 27.4.1958 | SCCA Regional Lime Rock [BM+BP+CP+UR+FIII] | 1 | XK120 M | Kenneth MacDonald | | 17th |
| 27.4.1958 | SCCA Regional Lime Rock [CM+DM+EM+FM+GM] | 34 | C-type | Gordon MacKenzie | | DNA |
| 27.4.1958 | WJC Charterhall [S+1.5] | 41 | D-type | Jimmy Somervail | Border Reivers | ?th |
| 27.4.1958 | WJC Charterhall [R/S+500] | 41 | D-type | Jim Clark | Border Reivers | DNF |
| 27.4.1958 | SCCA Regional Lime Rock [CM+DM+EM+FM+GM] | 49 | D-type | George Constantine | | DNA |
| 27.4.1958 | SCCA Regional Lime Rock [BM+BP+CP+UR+FIII] | 52 | C-type | Gordon MacKenzie | | 1st |
| 27.4.1958 | WJC Charterhall [S+1.5] | 52 | XK150 | Charles Ramsay | C. A. Ramsay | DNA |
| 27.4.1958 | SCCA Regional Louisville [BM+CM+DM+EM+FM+GM] | 54 | XKSS | Grove | | raced |
| 27.4.1958 | WJC Charterhall [R/S+500] | 55 | C-type | Alan Ensoll | A. Ensoll | raced |
| 27.4.1958 | WJC Charterhall [S+1.5] | 55 | C-type | Alan Ensoll | A. Ensoll | ?th |
| 27.4.1958 | WJC Charterhall [S+1.5] | 57 | D-type | Reg Harris | J. C. Broadhead | ?th |
| 27.4.1958 | WJC Charterhall [R/S+500] | 57 | D-type | Reg Harris | J. C. Broadhead | raced |
| 27.4.1958 | SCCA Regional Lime Rock [BM+BP+CP+UR+FIII] | 58 | XK140 | Richard Driscoll | | 14th |
| 27.4.1958 | SCCA Regional Lime Rock [BM+BP+CP+UR+FIII] | 60 | XK150 S | Walt Hansgen | | 4th |
| 27.4.1958 | SCCA Regional Lime Rock [BM+BP+CP+UR+FIII] | 76 | Special | Gerry Georgi | | 2nd |
| 27.4.1958 | SCCA Regional Lime Rock [BM+BP+CP+UR+FIII] | 80 | XK140 MC | Patrick Pratt | | DNA |
| 27.4.1958 | SCCA Regional Lime Rock [BM+BP+CP+UR+FIII] | 139 | XK140 MC | | | 11th |
| 27.4.1958 | SCCA Regional Lime Rock [BM+BP+CP+UR+FIII] | 162 | XK140 MC | Louis Hatcher | | 15th |
| 27.4.1958 | Preliminary Louisville [BM+CM+DM+EM+FM+GM] | | D-type | Jack Ensley | | 4th |
| 27.4.1958 | SCCA Regional Louisville [BM+CM+DM+EM+FM+GM] | | XKSS | Dave Causey | | 6th |
| 27.4.1958 | SCCA Regional Louisville [BM+CM+DM+EM+FM+GM] | | D-type | Jack Ensley | | raced |
| 27.4.1958 | Preliminary Louisville [BP+CP+DP] | | | Downing | | 8th |
| 3.5.1958 | Daily Express Silverstone [S+1.5] | | D-type | Ivor Bueb | | 6th |
| 3.5.1958 | Daily Express Silverstone [S+1.5] | | D-type | Jack Fairman | Ecurie Ecosse | raced |
| 3.5.1958 | Daily Express Silverstone [S+1.5] | | D-type | Innes Ireland | | 8th |
| 3.5.1958 | Daily Express Silverstone [S+1.5] | | D-type | Duncan Hamilton | | 7th |
| 4.5.1958 | SCCA National Virginia [BM+CM+DM+EM+FM+BP+CP] | 39 | XK140 MC | Dudley Smolen | | DNA |
| 4.5.1958 | Preliminary Virginia [BP+CP+BM+CM+DM+EM+FM] | 39 | XK140 MC | Dudley Smolen | | DNA |
| 4.5.1958 | SCCA National Virginia [BM+CM+DM+EM+FM+BP+CP] | 49 | D-type | George Constantine | | DNA |
| 4.5.1958 | Preliminary Virginia [BP+CP+BM+CM+DM+EM+FM] | 49 | D-type | George Constantine | | DNA |
| 4.5.1958 | SCCA National Virginia [BM+CM+DM+EM+FM+BP+CP] | 60 | D-type | Walt Hansgen | Briggs Cunningham | DNA |
| 4.5.1958 | Preliminary Virginia [BP+CP+BM+CM+DM+EM+FM] | 60 | D-type | Walt Hansgen | Briggs Cunningham | DNA |
| 4.5.1958 | Preliminary Virginia [BP+CP+BM+CM+DM+EM+FM] | 62 | XK150 S | Wallace | Briggs Cunningham | ?th |
| 4.5.1958 | SCCA National Virginia [BM+CM+DM+EM+FM+BP+CP] | 62 | XK150 S | Wallace | Briggs Cunningham | 12th |
| 4.5.1958 | Preliminary Virginia [BP+CP+BM+CM+DM+EM+FM] | 117 | | Henry Grimes | | DNA |
| 4.5.1958 | SCCA National Virginia [BM+CM+DM+EM+FM+BP+CP] | 117 | | Henry Grimes | | DNA |
| 4.5.1958 | Preliminary Virginia [BP+CP+BM+CM+DM+EM+FM] | 189 | D-type | Jim Robinson | | DNA |
| 4.5.1958 | SCCA National Virginia [BM+CM+DM+EM+FM+BP+CP] | 189 | D-type | Jim Robinson | | 8th |
| 4.5.1958 | Preliminary Virginia [BP+CP+BM+CM+DM+EM+FM] | 190 | XK140 MC | Jerome Robinson | | DNA |
| 4.5.1958 | SCCA National Virginia [BM+CM+DM+EM+FM+BP+CP] | 190 | XK140 MC | Jerome Robinson | | DNA |
| 10.5.1958 | Preliminary Tracy [Production +1.6] | 19 | | Dennis Sullivan | Dennis Sullivan | ?th |
| 10.5.1958 | 4 h Relay Harewood Acres | 20C | XK120 | Ham Leong | The Hasas | DNF |
| 10.5.1958 | Novice Tracy [Production +1.6] | 50 | XK120 | Al Jamieson | Al Jamieson | ?th |
| 10.5.1958 | Novice Tracy [Production +1.6] | 69 | XK120 | Robert Beale | Robert Beale, Jr. | ?th |
| 10.5.1958 | Preliminary Tracy [Production +1.6] | 69 | | Larry Albedi | Robert Beale, Jr. | DNA |
| 10.5.1958 | Preliminary Tracy [Production +1.6] | 77 | XK140 | Andy Nielsen | Andy Nielson | ?th |
| 10.5.1958 | Novice Tracy [Production +1.6] | 135 | | Frank Morrill | Frank Morrill | DNA |
| 10.5.1958 | Novice Tracy [Production +1.6] | 146 | XK120 M | Dave Ridenour | David W. Ridenour | 4th |
| 11.5.1958 | SCCA Regional Tracy [Production Group C] | 19 | | Dennis Sullivan | Dennis Sullivan | 16th |
| 11.5.1958 | Hawaii [S+1.6] | 27 | D-type | Bill Krause | Arnold Krause | DNS |
| 11.5.1958 | Hawaii [Match] | 27 | D-type | Bill Krause | Arnold Krause | DNA |
| 11.5.1958 | SCCA Regional Tracy [Production Group C] | 69 | | Larry Albedi | Robert Beale, Jr. | 12th |
| 11.5.1958 | SCCA Regional Tracy [Production Group C] | 77 | XK140 | Andy Nielsen | Andy Nielson | 9th |
| 11.5.1958 | Hawaii [S+1.6] | 78 | D-type | Carlyle Blackwell | Carlyle Blackwell | DNA |
| 11.5.1958 | Hawaii [Match] | 78 | D-type | Carlyle Blackwell | Carlyle Blackwell | DNA |
| 11.5.1958 | Hawaii [S+1.6] | 113 | | John Reilly | John Reilly | 13th |
| 11.5.1958 | Hawaii [Match] | 113 | | John Reilly | John Reilly | DNA |
| 11.5.1958 | Hawaii [Production +1.6] | 113 | | John Reilly | John Reilly | DNA |
| 11.5.1958 | Hawaii [Locals] | 113 | | John Reilly | John Reilly | 8th |
| 11.5.1958 | Hawaii [S+1.6] | 131 | | C. Sidman | | 15th |
| 11.5.1958 | Hawaii [Locals] | 131 | | C. Sidman | | 27th |
| 15.5.1958 | Aspern [S+1.5] | 2 | D-type | Jonathan Sieff | Jonathan Sieff | DNF |
| 15.5.1958 | Eläintarhanajo | 13 | D-type | Bjarne Rehn | Scuderia Askolin | 6th |
| 17.5.1958 | Chester | | D-type | C. K. Thompson | | 2nd |
| 17.5.1958 | AMOC Silverstone | | C-type | Mike Salmon | | 2nd |
| 18.5.1958 | GP Spa | 18 | D-type | Ivor Bueb | Ecurie Ecosse | 4th |
| 18.5.1958 | GP Spa | 19 | D-type | Jack Fairman | Ecurie Ecosse | 7th |
| 18.5.1958 | GP Spa | 20 | D-type | Jim Clark | Border Reivers | 8th |
| 18.5.1958 | GP Spa | 21 | D-type | Maurice Charles | | DNA |
| 18.5.1958 | GP Spa | 39 | XK140 | Murray | | DNA |
| 18.5.1958 | SCCA National Cumberland [BM+CM+DM] | 49 | D-type | George Constantine | Roberts Harrison | 4th |
| 18.5.1958 | LISCA Lime Rock [UR+CP] | 52 | C-type | Gordon MacKenzie | | ?th |
| 18.5.1958 | SCCA National Cumberland [BM+CM+DM] | 62 | D-type | Briggs Cunningham | Briggs S. Cunningham | DNA |
| 18.5.1958 | SCCA National Cumberland [BP+CP] | 63 | XK150 S | Walt Hansgen | Briggs Cunningham | DNA |
| 18.5.1958 | SCCA National Cumberland [BP+CP] | 88 | XK120 M | James Ryan | James S. Ryan | DNA |
| 18.5.1958 | LISCA Lime Rock [UR+CP] | 193 | Special | Gerry Georgi | | ?th |
| 18.5.1958 | LISCA Lime Rock [UR+CP] | | | S. Riker | | ?th |
| 18.5.1958 | LISCA Lime Rock [UR+CP] | | | J. Schutter | | ?th |
| 18.5.1958 | LISCA Lime Rock [UR+CP] | | D-type | Bruce Boyle | | ?th |
| 18.5.1958 | LISCA Lime Rock [UR+CP] | | | A. Luther | | ?th |
| 24.5.1958 | BRSCC Full Sutton [SR/R] | 90 | C-type | Alan Ensoll | | 8th |
| 24.5.1958 | BRSCC Full Sutton [SR/R] | 92 | D-type | Jim Clark | Border Reivers | 1st |
| 24.5.1958 | BRSCC Full Sutton [SR] | 92 | D-type | Jim Clark | Border Reivers | 1st |
| 24.5.1958 | BRSCC Full Sutton [SR] | 125 | D-type | Reg Harris | | 4th |
| 24.5.1958 | BRSCC Full Sutton [SR/R] | 125 | D-type | Reg Harris | | 3rd |
| 24.5.1958 | Whitsun Goodwood | | D-type | Duncan Hamilton | | 2nd |
| 25.5.1958 | Hourglass Field [Main] | | Special | Elgin Holmes | Jack Furcho | DNA |
| 26.5.1958 | Autosport Mallory Park [PS+1.6/PS1.0] | 51 | XK120 | Peter Sargent | P. J. Sargent | DNA |
| 26.5.1958 | NSCC Mallory Park [S+1.5] | 51 | XK120 | Peter Sargent | P. J. Sargent | DNA |
| 31.5.1958 | Novice Dunkirk [CM+EM+GM+HM+BP+CP+DP] | 2 | XK120 | Robert Holloway | | 9th |
| 31.5.1958 | Preliminary La Junta [Production+HM] | 14 | XK140 MC | George Gunther | | 4th |
| 31.5.1958 | Preliminary Santa Barbara [Modified +1.5] | 18 | D-type | Carlyle Blackwell | Carlyle Blackwell | DNA |
| 31.5.1958 | Novice Dunkirk [CM+EM+GM+HM+BP+CP+DP] | 36 | | Andrew Nicholas | | 8th |
| 31.5.1958 | SCCA National Bridgehampton [BP+CP+UR+FIII] | 63 | XK150 S | Walt Hansgen | Briggs Cunningham | 3rd |
| 31.5.1958 | SCCA National Bridgehampton [BP+CP+UR+FIII] | 88 | XK120 M | James Ryan | | 7th |
| 31.5.1958 | SCCA National Bridgehampton [BP+CP+UR+FIII] | 91 | XK120 | Bob Grossman | | DNF |
| 31.5.1958 | LASC Green Acres [Main] | 101 | XKSS | | | raced |
| 31.5.1958 | Preliminary Santa Barbara [Modified +1.5] | 127 | D-type | Bill Krause | Bill Krause | DNA |
| 31.5.1958 | SCCA National Bridgehampton [BP+CP+UR+FIII] | 190 | XK140 MC | Jerome Robinson | | 6th |
| 31.5.1958 | Preliminary Santa Barbara [Modified +1.5] | 204 | Special | Don Hulette | Don Hulette | DNA |