| 28.9.1958 | WJC Charterhall [GT] | 43 | XK120 | Norman Scott Wallace | N. J. Scott Wallace | raced |
| 28.9.1958 | WJC Charterhall [GT] | 78 | XK120 | A. A. P. Fildes | A. Fildes | raced |
| 4.10.1958 | Preliminary Virginia [Novice] | 125 | XK140 MC | Henry Grimes | | 1st |
| 5.10.1958 | SCCA Regional Thompson [Modified+UR] | 8 | Special | Gerry Georgi | Jerry Georgi | 6th |
| 5.10.1958 | SCCA Regional Thompson [BP+CP] | 27 | XK140 | Frederick de Bernardis | | 8th |
| 5.10.1958 | SCCA National Virginia [BP+CP+DP+EP] | 30 | XK140 | Frank Motley | | DNF |
| 5.10.1958 | SCCA Regional Thompson [BP+CP] | 40 | XK140 MC | Gordon Morris | | 7th |
| 5.10.1958 | SCCA Regional Thompson [BP+CP] | 43 | XK150 S | Kenneth MacDonald | Ken MacDonald | 4th |
| 5.10.1958 | SCCA National Vaca Valley [BP+CP+DP] | 47 | XK150 | Cliff Wright | | 6th |
| 5.10.1958 | SCCA Regional Thompson [Modified+UR] | 52 | C-type | Gordon MacKenzie | | 4th |
| 5.10.1958 | SCCA Regional Thompson [BP+CP] | 64 | XK120 M | William Hendrix | W. L. Hendrix | 6th |
| 5.10.1958 | SCCA National Vaca Valley [BP+CP+DP] | 77 | XK150 | Andy Nielsen | | 12th |
| 5.10.1958 | SCCA Regional Thompson [BP+CP] | 80 | XK150 S | Harry Carter | | DNS |
| 5.10.1958 | SCCA National Vaca Valley [BP+CP+DP] | 82 | Coupe | Roger Mace | | DNF |
| 5.10.1958 | BRSCC Brands Hatch [Production] | 89 | XK120 | John Fredman | H. J. Fredman | DNA |
| 5.10.1958 | SCCA National Vaca Valley [BM+CM+DM+EM+FM] | 100 | D-type | Ray Seher | | 6th |
| 5.10.1958 | SCCA Regional Thompson [BP+CP] | 100 | XK120 | Bruce Cargill | | 5th |
| 5.10.1958 | SCCA National Vaca Valley [BP+CP+DP] | 105 | XK120 | George Heaney | | 10th |
| 5.10.1958 | SCCA National Virginia [BP+CP+DP+EP] | 125 | XK140 MC | Henry Grimes | | 18th |
| 5.10.1958 | SCCA National Virginia [BP+CP+DP+EP] | 190 | XK150 S | Bob Grossman | | 5th |
| 11.10.1958 | LCCC Oulton Park [Formula Libre] | 6 | D-type | Peter Mould | Peter Mould | DNA |
| 11.10.1958 | LCCC Oulton Park [Sports] | 6 | D-type | Peter Mould | Peter Mould | DNA |
| 11.10.1958 | LCCC Oulton Park [Sports] | 6 | D-type | Peter Mould | Peter Mould | DNA |
| 11.10.1958 | Preliminary Venice [CM+DM+EM+FM+BP+CP+DP] | 10 | D-type | Ed Rahal | | 1st |
| 11.10.1958 | LCCC Oulton Park [Formula Libre] | 25 | D-type | Peter Blond | Peter Blond | DNA |
| 11.10.1958 | LCCC Oulton Park [Sports] | 25 | D-type | Peter Blond | Peter Blond | DNS |
| 11.10.1958 | LCCC Oulton Park [Sports] | 25 | D-type | Peter Blond | Peter Blond | DNS |
| 11.10.1958 | 1 h Snetterton | 52 | Mark I 3.4 | | J. Coombs | DNA |
| 11.10.1958 | LCCC Oulton Park [Sports] | 55 | Mk VII | Bob Berry | Bob Berry | ?th |
| 11.10.1958 | LCCC Oulton Park [Sports] | 55 | Mk VII | Bob Berry | Bob Berry | DNF |
| 11.10.1958 | LCCC Oulton Park [Formula Libre] | 55 | Mk VII | Bob Berry | Bob Berry | 7th |
| 11.10.1958 | 1 h Snetterton | 56 | Mark I 3.4 | Tommy Sopwith | Equipe Endeavour | 1st |
| 11.10.1958 | 1 h Snetterton | 57 | Mark I 3.4 | G. Bailey | Equipe Endeavour | DNA |
| 11.10.1958 | 1 h Snetterton | 59 | Mark I 2.4 | Peter Jopp | P. Jopp | DNF |
| 11.10.1958 | LCCC Oulton Park [Formula Libre] | 69 | D-type | Reg Harris | J. C. Broadhead | unused |
| 11.10.1958 | LCCC Oulton Park [Sports] | 69 | D-type | Reg Harris | J. C. Broadhead | DNS |
| 11.10.1958 | LCCC Oulton Park [Sports] | 69 | D-type | Reg Harris | J. C. Broadhead | unused |
| 11.10.1958 | SMRC Snetterton [Sports] | 80 | D-type | Peter Mould | P. Mould | DNF |
| 11.10.1958 | LCCC Oulton Park [Sports] | 96 | XK120 | W. P. Sheppard | W. P. Sheppard | DNS |
| 11.10.1958 | LCCC Oulton Park [Sports] | 96 | XK120 | W. P. Sheppard | W. P. Sheppard | DNA |
| 12.10.1958 | 6 h Venice | 10 | D-type | Ed Rahal | | ?th |
| 12.10.1958 | SCCA Regional Wilmot [CP+DP+EP] | 11 | | Dick Novotny | | DNF |
| 12.10.1958 | USAC Riverside | 27 | D-type | Bill Krause | Frank Millard | 3rd |
| 12.10.1958 | SCCA Regional Wilmot [CP+DP+EP] | 74 | | Roy Fleischman | | 1st |
| 12.10.1958 | Riverside [BP+CP+DP+EP+FP] | 82 | XK140 | Bob Baxter | Jack Furcha | DNF |
| 12.10.1958 | Riverside [BP+CP+DP+EP+FP] | 137 | XK120 | George Duncan | West Coast Racing | 11th |
| 18.10.1958 | SCCA Regional Lime Rock [UR+FIII] | 46 | Special | Gerry Georgi | | 1st |
| 19.10.1958 | SCCA Regional Lime Rock [BP+CP+DP] | 9 | XK150 S | Bob Grossman | | 3rd |
| 19.10.1958 | SCCA Regional Lime Rock [BP+CP+DP] | 40 | XK140 MC | Gordon Morris | | 13th |
| 19.10.1958 | SCCA Regional Lime Rock [Main] | 46 | Special | Gerry Georgi | | 3rd |
| 19.10.1958 | SCCA Regional Lime Rock [Main] | 52 | C-type | Gordon MacKenzie | | 5th |
| 19.10.1958 | SCCA Regional Lime Rock [BP+CP+DP] | 76 | XK140 MC | Frederick de Bernardis | | raced |
| 19.10.1958 | SCCA Regional Lime Rock [BP+CP+DP] | 103 | XK120 | Bruce Cargill | | 8th |
| 25.10.1958 | Preliminary Minden [BM+CM+DM+EM] | | D-type | Ray Seher | | 3rd |
| 26.10.1958 | SCCA Regional Dothan [Main] | 2 | Special | Peyton McCormack | Peyton McCormack | DNA |
| 26.10.1958 | SCCA Regional Dothan [Main] | 10 | D-type | Ed Rahal | Ed Rahal | DNA |
| 26.10.1958 | Minden [BP+CP+DP] | 24 | XK120 | George Duncan | | 15th |
| 26.10.1958 | Preliminary Dothan [Ladies] | 36 | XK120 | Virginia Benton | Virginia Benton | DNA |
| 26.10.1958 | SCCA Regional Dothan [Main] | 77 | D-type | C. K. Thompson | C. K. Thompson | DNF |
| 26.10.1958 | Preliminary Dothan [Novice] | 77 | D-type | Powell Thompson | C. K. Thompson | DNA |
| 26.10.1958 | Minden [BM+CM+DM+EM] | 100 | D-type | Ray Seher | | 4th |
| 26.10.1958 | Minden [BP+CP+DP] | 105 | XK120 | George Heaney | | 12th |
| 26.10.1958 | Vineland [Main] | 149 | D-type | George Constantine | | raced |
| 26.10.1958 | Minden [BP+CP+DP] | 214 | XK120 | Clarence Seher | | 13th |
| 26.10.1958 | Vineland [CP] | 310 | XK150 S | | | raced |
| 26.10.1958 | Vineland [CP] | | XK140 | | | raced |
| 26.10.1958 | SCCA Regional Dothan [DP+EP+XK+Veloce] | | | | | ?th |
| 26.10.1958 | SCCA Regional Dothan [DP+EP+XK+Veloce] | | | | | ?th |
| 1.11.1958 | Preliminary Palm Springs [BP+CP+DP+EP] | 15 | XK120 M | Dick Wells | Richard Wells | DNA |
| 1.11.1958 | Preliminary Palm Springs [BP+CP+DP+EP] | 27 | XK150 S | Howard Quick | Dorothy LeRoy Quick | DNA |
| 1.11.1958 | Preliminary Palm Springs [Ladies+FIII] | 27 | XK150 S | Dorothy LeRoy Quick | Dorothy LeRoy Quick | DNA |
| 2.11.1958 | SCCA National Palm Springs [BP+CP+DP] | 15 | XK120 M | Dick Wells | Richard Wells | 4th |
| 2.11.1958 | Palm Springs [Exhibition] | 27 | D-type | Bill Krause | Bill Krause | DNA |
| 2.11.1958 | SCCA National Palm Springs [BP+CP+DP] | 27 | XK150 S | Howard Quick | Dorothy LeRoy Quick | DNF |
| 2.11.1958 | Palm Springs [Ladies+Sedan+FIII] | 27 | XK150 S | Dorothy LeRoy Quick | Dorothy LeRoy Quick | DNA |
| 2.11.1958 | SCCA Regional Oklahoma [Production +2.0] | 40 | | John Abel | | 6th |
| 2.11.1958 | SCCA Regional Oklahoma [Production 3.5+HM] | 40 | | John Abel | | ?th |
| 2.11.1958 | Palm Springs [Exhibition] | 77 | D-type | Bill Leyen | Bill Leyen | DNA |
| 2.11.1958 | SCCA Regional Oklahoma [Production 3.5+HM] | | | Ben Ellis | | ?th |
| 2.11.1958 | SCCA Regional Oklahoma [Production 3.5+HM] | | XK140 | Homer Frazier | | DNF |
| 2.11.1958 | SCCA Regional Oklahoma [Production +2.0] | | | Ben Ellis | | ?th |
| 2.11.1958 | SCCA Regional Oklahoma [Production +2.0] | | XK150 S | Bill Horton | | raced |
| 2.11.1958 | SCCA Regional Oklahoma [Production +2.0] | | XK140 | Homer Frazier | | 4th |
| 9.11.1958 | SCCA Regional Laguna Seca [BP+CP+DP] | 6 | XK150 S | Roger Mace | Mark Elmo | raced |
| 9.11.1958 | SCCA Regional Laguna Seca [BP+CP+DP] | 119 | XK120 | Dennis Sullivan | Dennis Sullivan | DNA |
| 9.11.1958 | SCCA Regional Laguna Seca [BM+CM+DM] | 204 | Special | Don Hulette | | 6th |
| 9.11.1958 | SCCA Regional Laguna Seca [BM+CM+DM] | 227 | D-type | Bill Krause | Bill Krause | DNF |
| 9.11.1958 | SCCA Regional Laguna Seca [BP+CP+DP] | | | A. K. Neilson | | DNF |
| 15.11.1958 | 9 h Johannesburg | 38 | XK120 | Gomes / Pinheiro | Africa Motores Ltda. | 14th |
| 16.11.1958 | SCCA Regional Marlboro [BM+EM+FM+GM+BP+CP+DP] | 25 | XK140 MC | Henry Grimes | | 15th |
| 16.11.1958 | Preliminary Marlboro [BP+CP+DP+EP] | 25 | XK140 MC | J. Kendrick | | 14th |
| 16.11.1958 | SCCA Regional Marlboro [BM+EM+FM+GM+BP+CP+DP] | 49 | XK140 MC | Charlie Hayes | | 14th |
| 16.11.1958 | Preliminary Marlboro [BP+CP+DP+EP] | 49 | XK140 MC | Hayes | | 8th |
| 16.11.1958 | Preliminary Marlboro [BP+CP+DP+EP] | 100 | XK120 | R. Haas | | DNF |
| 22.11.1958 | 6 h Pomona | | Special | Hulette / Hauser | | raced |
| 22.11.1958 | 6 h Pomona | | D-type | Blackwell / Miles | Carlyle Blackwell, Jr. | 1st |
| 23.11.1958 | Pomona [BP+CP+DP+EP] | | XK120 | Black | | DNF |
| 30.11.1958 | Hammond [Main] | 17 | D-type | Bill Fuller | | raced |
| 30.11.1958 | Phoenix [BP+CP+DP+EP] | | XK120 M | Dick Wells | | ?th |
| 30.11.1958 | Phoenix [Production] | | XK120 M | Dick Wells | | 8th |