| 9.2.1958 | Pomona [S+1.5] | 204 | Special | Don Hulette | Don Hulette | DNA |
| 9.2.1958 | Guadalajara | | D-type | Jack Ensley | | DNA |
| 9.2.1958 | Guadalajara | | D-type | Jose A. Segura | | DNF |
| 9.2.1958 | Guadalajara | | Special | | | DNS |
| 16.2.1958 | SCCA Regional New Smyrna Beach [Modified+BP+CP+DP+EP] | 17 | D-type | Jack Ensley | | DNA |
| 16.2.1958 | Preliminary New Smyrna Beach [Modified] | 17 | D-type | Jack Ensley | | DNA |
| 16.2.1958 | SCCA Regional New Smyrna Beach [Modified+BP+CP+DP+EP] | 89 | | Dick Shaddelee | | DNA |
| 16.2.1958 | Preliminary New Smyrna Beach [BP+CP+DP+EP] | 89 | | Dick Shaddelee | | DNA |
| 16.2.1958 | SCCA Regional New Smyrna Beach [Modified+BP+CP+DP+EP] | 111 | D-type | Harry Rollings | | 4th |
| 16.2.1958 | Preliminary New Smyrna Beach [Modified] | 111 | D-type | Harry Rollings | | raced |
| 16.2.1958 | SCCA Regional New Smyrna Beach [Modified+BP+CP+DP+EP] | 128 | | W. F. Flagg | | DNA |
| 16.2.1958 | Preliminary New Smyrna Beach [BP+CP+DP+EP] | 128 | | W. F. Flagg | | DNA |
| 16.2.1958 | Willow Springs [Main] | | XK140 | Bob Kudler | | DNA |
| 16.2.1958 | SCCA Regional New Smyrna Beach [Modified+BP+CP+DP+EP] | | D-type | Walt Hansgen | Briggs Cunningham | DNA |
| 16.2.1958 | SCCA Regional New Smyrna Beach [Modified+BP+CP+DP+EP] | | | | | ?th |
| 1.3.1958 | Preliminary Phoenix [Novice] | 8 | XK120 M | Dick Wells | | 7th |
| 2.3.1958 | SCCA Regional Phoenix [Main] | 8 | XK120 M | Dick Wells | | 21st |
| 2.3.1958 | SCCA Regional Phoenix [BP+CP+DP+EP] | 8 | XK120 M | Dick Wells | | 4th |
| 2.3.1958 | SCCA Regional Phoenix [Production] | 8 | XK120 M | Dick Wells | | 7th |
| 2.3.1958 | SCCA Regional Phoenix [BP+CP+DP+EP] | 52 | XK120 M | Hap Richardson | | DNF |
| 2.3.1958 | SCCA Regional Phoenix [BP+CP+DP+EP] | 191 | XK140 MC | Roy Heath | | 5th |
| 2.3.1958 | SCCA Regional Phoenix [Production] | 191 | XK140 MC | Roy Heath | | DNS |
| 9.3.1958 | SCCA Regional Boca Raton [CM+DM+EM+FM+GM+BP+CP+DP] | 5 | XK140 | Ed Wilson | | ?th |
| 9.3.1958 | Preliminary Boca Raton [BP+CP+DP+EP] | 5 | | Ed Wilson | | ?th |
| 9.3.1958 | SCCA Regional Mansfield [CM+DM+EM+FM+GM] | 12 | C-type | Mason O'Keiff | | 4th |
| 9.3.1958 | Preliminary Mansfield [CM+DM+EM+BP+CP] | 12 | C-type | Mason O'Keiff | | 5th |
| 9.3.1958 | Preliminary Mansfield [CM+DM+EM+BP+CP] | 16 | XKSS | Bob Stonedale | | 4th |
| 9.3.1958 | SCCA Regional Mansfield [CM+DM+EM+FM+GM] | 16 | XKSS | Bob Stonedale | | DNF |
| 9.3.1958 | Preliminary Boca Raton [CM+DM+EM+FM+GM] | 17 | D-type | Jack Ensley | | raced |
| 9.3.1958 | SCCA Regional Boca Raton [CM+DM+EM+FM+GM+BP+CP+DP] | 17 | D-type | Jack Ensley | | raced |
| 9.3.1958 | SCCA Regional Boca Raton [CM+DM+EM+FM+GM+BP+CP+DP] | 31 | | Bob Colosia | | raced |
| 9.3.1958 | Preliminary Boca Raton [BP+CP+DP+EP] | 31 | | Bob Colosia | | raced |
| 9.3.1958 | Preliminary Boca Raton [CM+DM+EM+FM+GM] | 49 | D-type | George Constantine | Robert Harrison | raced |
| 9.3.1958 | SCCA Regional Boca Raton [CM+DM+EM+FM+GM+BP+CP+DP] | 49 | D-type | George Constantine | Robert Harrison | raced |
| 9.3.1958 | Preliminary Boca Raton [CM+DM+EM+FM+GM] | 111 | D-type | Harry Rollins | | raced |
| 9.3.1958 | SCCA Regional Boca Raton [CM+DM+EM+FM+GM+BP+CP+DP] | 111 | D-type | Harry Rollins | | raced |
| 9.3.1958 | SCCA Regional Boca Raton [CM+DM+EM+FM+GM+BP+CP+DP] | 621 | | Don Smith | | raced |
| 9.3.1958 | Preliminary Boca Raton [BP+CP+DP+EP] | 621 | | Don Smith | | raced |
| 16.3.1958 | Lago de Guadalupe | | XK120 | Manuel Cortez | | raced |
| 22.3.1958 | 12 h Sebring | 8 | D-type | Sanderson / Bueb | Ecurie Ecosse | DNF |
| 22.3.1958 | 12 h Sebring | 9 | D-type | Flockhart / Gregory | Ecurie Ecosse | DNF |
| 22.3.1958 | 12 h Sebring | 12 | D-type | Cunningham / Hansgen | Alfred Momo | DNF |
| 22.3.1958 | 12 h Sebring | | D-type | Jack Ensley | Jack Ensley | DNA |
| 23.3.1958 | Preliminary Stockton [Novice Production +1.6] | 2 | XK120 | Frank Morrill | | 5th |
| 23.3.1958 | Preliminary Stockton [Novice Production +1.6] | 69 | XK120 | Robert Beale | | 27th |
| 23.3.1958 | SCCA Regional Stockton [Production +1.6] | 105 | XK120 | George Heaney | | 8th |
| 23.3.1958 | Preliminary Stockton [Novice Production +1.6] | 154 | XK120 | Al Jamieson | | 24th |
| 29.3.1958 | BARC Mallory Park [Handicap B] | 44 | C-type | Mike Salmon | Mike Salmon | 4th |
| 29.3.1958 | BARC Mallory Park [S+1.1] | 45 | XK150 | Miss Rosemary Massey | Rosemary Massey | DNF |
| 29.3.1958 | BARC Mallory Park [S+1.1] | 46 | XK120 | Peter Sargent | Peter Sargent | 4th |
| 29.3.1958 | BARC Mallory Park [S+1.1] | 47 | XK120 | John Fredman | H. J. Fredman | 7th |
| 30.3.1958 | Willow Springs [Main] | 19 | XK140 | Kay Furcho | Kay Furcho | DNA |
| 30.3.1958 | Willow Springs [Production +1.6] | 19 | XK140 | Kay Furcho | Kay Furcho | DNA |
| 30.3.1958 | SCC-BC Abbotsford [Modified +1.5] | 51 | D-type | Rattenbury | | 1st |
| 30.3.1958 | SCC-BC Abbotsford [Main] | 51 | D-type | Rattenbury | | 1st |
| 30.3.1958 | Willow Springs [Production +1.6] | 169 | XK140 | Bob Kudler | Advance Neon | DNA |
| 30.3.1958 | Willow Springs [Main] | 169 | XK140 | Bob Kudler | Advance Neon | DNA |
| 30.3.1958 | Willow Springs [Main] | | XK140 | Elgin Holmes | | 2nd |
| 30.3.1958 | Willow Springs [Ladies] | | XK140 | Kay Furcho | | 2nd |
| 30.3.1958 | Willow Springs [Production +1.6] | | XK140 | Elgin Holmes | | 2nd |
| 5.4.1958 | BRSCC Full Sutton [PS] | 46 | Mk VII | M. E. Marsh | M. E. Marsh | DNA |
| 5.4.1958 | BRSCC Full Sutton [PS] | 51 | XK120 | D. Chippindale | D. Chippindale | DNA |
| 5.4.1958 | BRSCC Full Sutton [PS] | 58 | Mark I 3.4 | Phil Walton | P. G. Walton | 8th |
| 5.4.1958 | BRSCC Full Sutton [PS] | 68 | Mark I 3.4 | D. B. Houston | D. B. Houston | DNA |
| 5.4.1958 | BRSCC Full Sutton [SR/R] | 92 | D-type | Jim Clark | Border Reivers | 1st |
| 5.4.1958 | BRSCC Full Sutton [Formula Libre] | 92 | D-type | Jim Clark | Border Reivers | 1st |
| 7.4.1958 | Sussex Trophy Goodwood | 69 | D-type | Duncan Hamilton | | 3rd |
| 7.4.1958 | Sussex Trophy Goodwood | 79 | D-type | Maurice Charles | | 6th |
| 7.4.1958 | National Brands Hatch [Formula Libre] | 106 | C-type | Gordon Lee | Gordon Lee | 5th |
| 12.4.1958 | Grand Central [Sports] | 3 | D-type | Jimmy de Villiers | | 1st |
| 12.4.1958 | Grand Central [1820 Settlers] | 3 | D-type | Jimmy de Villiers | | 3rd |
| 12.4.1958 | Grand Central [R+1.4] | 3 | D-type | Jimmy de Villiers | | 1st |
| 12.4.1958 | British Empire Trophy | 60 | D-type | Peter Blond | J. C. Broadhead | DNF |
| 12.4.1958 | British Empire Trophy | 69 | D-type | James Forbes Clark | J. F. Clark | DNQ |
| 12.4.1958 | British Empire Trophy | 74 | D-type | Duncan Hamilton | J. Duncan Hamilton | 4th |
| 12.4.1958 | British Empire Trophy | 75 | D-type | Jonathan Sieff | J. Sieff | DNQ |
| 13.4.1958 | SCCA Regional Palm Springs [BP+CP+DP+EP] | 97 | XK140 | Andy Nielsen | Andy Nielson | 10th |
| 13.4.1958 | SCCA Regional Palm Springs [BM+CM+DM+EM] | 127 | D-type | Bill Krause | Bill Krause | 6th |
| 13.4.1958 | GP Avandaro | | Special | Don Hulette | | DNF |
| 13.4.1958 | GP Avandaro | | XKSS | Bob Stonedale | | raced |
| 19.4.1958 | Aintree 200 [S+1.1] | 76 | D-type | Ivor Bueb | Ecurie Ecosse | 4th |
| 19.4.1958 | Aintree 200 [S+1.1] | 77 | D-type | Jack Fairman | Ecurie Ecosse | 7th |
| 19.4.1958 | Aintree 200 [S+1.1] | 78 | D-type | Duncan Hamilton | Duncan Hamilton | 6th |
| 19.4.1958 | Aintree 200 [S+1.1] | 79 | D-type | Maurice Charles | Maurice Charles Motors Ltd. | 12th |
| 19.4.1958 | Aintree 200 [S+1.1] | 80 | D-type | Jonathan Sieff | Jonathan Sieff | 14th |
| 19.4.1958 | Aintree 200 [S+1.1] | 82 | D-type | Jimmy Somervail | Border Reivers | DNA |
| 19.4.1958 | Aintree 200 [S+1.1] | 83 | D-type | Jim Clark | Border Reivers | DNA |
| 19.4.1958 | Aintree 200 [S+1.1] | 84 | C-type | Mike Salmon | Gerrards Cross Motor Co. Ltd. | 13th |
| 20.4.1958 | San Salvador | 1 | D-type | Mauricio Miranda | Mauricio L. Miranda | DNF |
| 20.4.1958 | SCCA Regional Galveston [Modified] | 12 | C-type | Mason O'Keiff | | 7th |
| 20.4.1958 | SCCA Regional Galveston [Modified] | 16 | XKSS | Bob Stonedale | | DNS |
| 20.4.1958 | Preliminary Galveston [CM+DM+EM] | 16 | XKSS | Bob Stonedale | | DNS |
| 20.4.1958 | SCCA National Marlboro [BP+CP+DP] | 39 | | Dudley Smolen | | 11th |
| 20.4.1958 | SCCA National Marlboro [BP+CP+DP] | 42 | | John Hayes | | 8th |
| 20.4.1958 | SCCA National Marlboro [BM+CM+DM+EM+FM] | 52 | C-type | Gordon MacKenzie | | 6th |
| 20.4.1958 | SCCA National Marlboro [BM+CM+DM+EM+FM] | 61 | D-type | Ed Crawford | Briggs Cunningham | 4th |
| 20.4.1958 | SCCA National Marlboro [BP+CP+DP] | 117 | | Henry Grimes | | DNF |
| 20.4.1958 | SCCA National Marlboro [BM+CM+DM+EM+FM] | 189 | D-type | Jim Robinson | | DNF |
| 20.4.1958 | SCCA National Marlboro [BP+CP+DP] | 190 | XK140 MC | Jerome Robinson | | 10th |
| 26.4.1958 | Preliminary Louisville [Novice] | | D-type | | | raced |