| 10.5.1958 | 4 h Relay Harewood Acres | 10A | Mark VI | Oliver Clubine | Ecurie Grande | 13th |
| 10.5.1958 | 4 h Relay Harewood Acres | 13C | Mark IX | Tom Gilmour | Allsorts | DNF |
| 10.5.1958 | 4 h Relay Harewood Acres | 14C | Mark IX | Robert E. Davidson | Ecurie Volanti | 9th |
| 10.5.1958 | Novice Tracy [Modified] | | Eleven | Bill Olson | | 2nd |
| 11.5.1958 | SCCA Regional Tracy [MG+Ladies+Sedan+FIII] | 16 | Eleven | Charlotte Duncan | John D. Miller | 2nd |
| 11.5.1958 | SCCA Regional Tracy [FM+GM+HM] | 16 | Eleven | John Miller | John D. Miller | 8th |
| 11.5.1958 | SCCA Regional Tracy [FM+GM+HM] | 35 | Eleven Le Mans | John P. Young | John P. Young | DNA |
| 11.5.1958 | SCCA Regional Tracy [FM+GM+HM] | 39 | Eleven | James Lowe | James R. Lowe | DNA |
| 11.5.1958 | Hawaii [S1.6] | 44 | Eleven | Frank Monise | Frank Monise | DNA |
| 11.5.1958 | Hawaii [Match] | 44 | Eleven | Frank Monise | Frank Monise | DNA |
| 11.5.1958 | SCCA Regional Tracy [FM+GM+HM] | 46 | Eleven Le Mans | Jim Hughes | James C. McCandless | 6th |
| 11.5.1958 | Hawaii [Match] | 52 | Eleven Le Mans | John Hoogs | John Hoogs | DNA |
| 11.5.1958 | Hawaii [S1.6] | 52 | Eleven Le Mans | Cal Niday | John Hoogs | 10th |
| 11.5.1958 | Hawaii [Locals] | 52 | Eleven Le Mans | Cal Niday | John Hoogs | 11th |
| 11.5.1958 | Hawaii [S+1.6] | 52 | Eleven Le Mans | Cal Niday | John Hoogs | 17th |
| 11.5.1958 | SCCA Regional Tracy [FM+GM+HM] | 87 | Eleven Le Mans | Paul Nau | Paul Nau | 4th |
| 11.5.1958 | Hawaii [S1.6] | 100 | Mark VI | Bob Bringham | Bob Bringham | DNF |
| 11.5.1958 | Hawaii [Match] | 100 | Mark VI | Bob Bringham | Bob Bringham | DNA |
| 11.5.1958 | Hawaii [S1.6] | 171 | Eleven Club | Gino Wojciechowski | Gino Wojciechowski | 4th |
| 11.5.1958 | Hawaii [Locals] | 171 | Eleven Club | Gino Wojciechowski | Gino Wojciechowski | 3rd |
| 11.5.1958 | Hawaii [Match] | 171 | Eleven Club | Gino Wojciechowski | Gino Wojciechowski | DNA |
| 11.5.1958 | Hawaii [S1.6] | 177 | Eleven Club | | Scuderia Encina | DNA |
| 11.5.1958 | Hawaii [Match] | 177 | Eleven Club | | Scuderia Encina | DNA |
| 11.5.1958 | Hawaii [Match] | 421 | | Frank Monise | Frank Monise | DNA |
| 11.5.1958 | Hawaii [S1.6] | 421 | | Frank Monise | Frank Monise | DNA |
| 15.5.1958 | Eläintarhanajo | 1 | Eleven Le Mans | Holger Laine | | 11th |
| 15.5.1958 | Eläintarhanajo | 2 | Eleven | David Piper | | 8th |
| 15.5.1958 | Eläintarhanajo | 5 | 12 | Ivor Bueb | | 1st |
| 15.5.1958 | Aspern [S1.5] | 22 | Eleven | John Campbell-Jones | Dan Margulies | DNF |
| 17.5.1958 | AMOC Silverstone | 63 | Mark VI | Averil Scott-Moncrieff | | raced |
| 18.5.1958 | SCCA National Cumberland [GM+HM] | 2 | Eleven Le Mans | M. R. J. Wyllie | Margaret J. Wyllie | ?th |
| 18.5.1958 | Preliminary Cumberland [Ladies] | 2 | Eleven Le Mans | Margaret Wyllie | Margaret J. Wyllie | 2nd |
| 18.5.1958 | GP Spa | 23 | 15 | Berchem | | ?th |
| 18.5.1958 | GP Spa | 24 | | Naylor | | DNA |
| 18.5.1958 | SCCA National Cumberland [GM+HM] | 35 | Eleven | Frank Baptista | Continental Motors, Ltd. | 1st |
| 18.5.1958 | SCCA National Cumberland [GM+HM] | 45 | Eleven | Gilbert Geitner | Major Gil Geitner | DNA |
| 18.5.1958 | SCCA National Cumberland [GM+HM] | 54 | Eleven | Robert Weiler | Robert Weiler | DNA |
| 18.5.1958 | SCCA National Cumberland [GM+HM] | 116 | Eleven | Floyd Aaskov | Louis C. Bartol | DNA |
| 18.5.1958 | SCCA National Cumberland [GM+HM] | 133 | Eleven | Tom Gilmour | Thomas Gilmour | raced |
| 18.5.1958 | LISCA Lime Rock [GM+HM+EP] | | Eleven | Sy Kaback | | ?th |
| 18.5.1958 | LISCA Lime Rock [GM+HM+EP] | | Eleven | Thomas Scatchard | | ?th |
| 24.5.1958 | BRSCC Full Sutton [SR] | 19 | Mark VI | Tom Candlish | | 17th |
| 24.5.1958 | BRSCC Full Sutton [SR] | 22 | Eleven Series 2 | Tom Dickson | | 2nd |
| 24.5.1958 | BRSCC Full Sutton [SR1.5] | 22 | Eleven Series 2 | Tom Dickson | | 1st |
| 24.5.1958 | BRSCC Full Sutton [SR/R] | 22 | Eleven Series 2 | Tom Dickson | | 2nd |
| 24.5.1958 | BRSCC Full Sutton [SR1.5] | 23 | Eleven | Stuart Dodd | | 3rd |
| 24.5.1958 | BRSCC Full Sutton [SR] | 23 | Eleven | Stuart Dodd | | 11th |
| 24.5.1958 | BRSCC Full Sutton [SR/R] | 24 | | F. P. Massy Dawson | | 6th |
| 24.5.1958 | BRSCC Full Sutton [SR] | 24 | | F. P. Massy Dawson | | 5th |
| 24.5.1958 | BRSCC Full Sutton [SR1.5] | 24 | | F. P. Massy Dawson | | 12th |
| 24.5.1958 | BRSCC Full Sutton [SR1.5] | 27 | Mark IX | Rodney Bloor | | 8th |
| 24.5.1958 | BRSCC Full Sutton [SR/R] | 27 | Mark IX | Rodney Bloor | | 11th |
| 24.5.1958 | BRSCC Full Sutton [SR] | 27 | Mark IX | Warwick Bloor | | 7th |
| 24.5.1958 | BRSCC Full Sutton [SR1.5] | 29 | Eleven Series 2 | Lewis Bramley | | 6th |
| 24.5.1958 | BRSCC Full Sutton [SR] | 30 | Eleven | Bill Allen | | 12th |
| 24.5.1958 | BRSCC Full Sutton [SR1.5] | 30 | Eleven | Bill Allen | | 4th |
| 24.5.1958 | BRSCC Full Sutton [SR1.5] | 31 | Eleven | B. R. Potter | | 11th |
| 24.5.1958 | BRSCC Full Sutton [SR1.5] | 32 | Eleven Club | Ralph Walker | | 9th |
| 24.5.1958 | BRSCC Full Sutton [SR] | 32 | Eleven Club | Ralph Walker | | 13th |
| 24.5.1958 | BRSCC Full Sutton [SR] | 34 | Eleven | Greg Wood | | 16th |
| 24.5.1958 | BRSCC Full Sutton [SR1.5] | 37 | Eleven Sport | Peter Anders | | 10th |
| 24.5.1958 | BRSCC Full Sutton [SR1.5] | 39 | Eleven | John Wagstaff | | 7th |
| 24.5.1958 | BRSCC Full Sutton [PS] | 44 | | B. A. Cooper | | 17th |
| 24.5.1958 | BRSCC Full Sutton [PS] | 48 | | C. W. Jepson | | 15th |
| 24.5.1958 | BRSCC Full Sutton [PS] | 49 | Mark VI | A. R. Darley | | 9th |
| 24.5.1958 | BRSCC Full Sutton [SR] | 50 | | J. Leighton | | 15th |
| 24.5.1958 | BRSCC Full Sutton [SR1.5] | 52 | Mark VI | D. M. Pownall | | 13th |
| 24.5.1958 | BRSCC Full Sutton [SR] | 52 | Mark VI | D. M. Pownall | | 19th |
| 24.5.1958 | BRSCC Full Sutton [SR] | 66 | | Philip Dann | | 9th |
| 24.5.1958 | Whitsun Goodwood | | Eleven | Bill Frost | | 6th |
| 24.5.1958 | Whitsun Goodwood | | Eleven | Bob Hicks | | 5th |
| 24.5.1958 | Whitsun Goodwood | | | Chris Bristow | | 3rd |
| 25.5.1958 | GP des Frontières | 8 | Eleven | André Wicky | | DNF |
| 25.5.1958 | GP des Frontières | 14 | 15 | Pierre Berchem | | DNF |
| 25.5.1958 | GP des Frontières | 22 | Eleven | David Piper | | 8th |
| 25.5.1958 | GP des Frontières | 28 | Eleven Series 2 | John Campbell-Jones | | 5th |
| 25.5.1958 | GP des Frontières | 34 | Eleven | Gordon Fowell | | 6th |
| 25.5.1958 | GP des Frontières | 36 | Eleven Series 2 | Jimmy Blumer | | 3rd |
| 25.5.1958 | Hourglass Field [Modified] | | Eleven | Eugene Scholl | | 3rd |
| 25.5.1958 | National Open Crystal Palace [S1.1] | | Eleven | Innes Ireland | | 2nd |
| 25.5.1958 | National Open Crystal Palace [S1.1] | | Eleven | Alan Stacey | | 1st |
| 25.5.1958 | National Open Crystal Palace [S1.1] | | Eleven | Mike Taylor | | 3rd |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 11 | | John Higham | Ecurie White Rose | DNA |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 12 | Eleven Series 2 | John Burgess | Ecurie White Rose | ?th |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 14 | Eleven Series 2 | Colin Escott | C. G. Escott | ?th |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 15 | Eleven | Peter Arundell | Cranham Service Station | DNA |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 16 | | Geoff Williamson | G. H. Williamson | DNA |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 17 | Eleven Sport | John Mitchell | E. J. B. Mitchell | DNA |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 18 | | J. Leighton | Scuderia Birchwood | DNA |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 19 | | W. G. Teale | W. G. Teale | DNA |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 21 | Elite | Ian Walker | I. Walker | ?th |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 26 | | Gil Baird | G. Baird | DNA |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 27 | | Alex McMillan | A. McMillan | DNA |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 28 | Eleven Le Mans | David Brough | Team Sapphire | ?th |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 29 | Eleven | Mike Dickens | Team Sapphire | DNA |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 30 | Eleven Sport | Bob Staples | Ecurie Gnuts | DNA |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 31 | | Gordon Jones | G. M. Jones | ?th |
| 26.5.1958 | Autosport Mallory Park [PS1.6] | 43 | Elite | John Lawry | Arden Racing & Sports Cars | DNA |
| 26.5.1958 | Autosport Mallory Park [PS1.6] | 44 | Elite | Ian Walker | I. Walker | DNA |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 69 | Eleven | Lionel Mayman | Kay Garages | ?th |