The Mario Verga and Ezio Selva cups
Having overcome the shock at the tragic death of Ezio Selva, the UIM considered the possibility of raising the limit for the KD class to 900 kg: something which, incredibly, did not happen before 1962.

Since its inception, the KD 800 kg world racers championship has always been held in the classic motorboat meeting of Campione d'Italia. In 1958, however, the same organizers, citing economic reasons, decided to replace the world competition with an international race (always KD) with the Mario Verga cup as the prize. On the waters of Lake Ceresio, we still witnessed a very spectacular test, thanks to the presence of six boats: those of the Italians Dell'Orto, Liborio and Giorgio Guidotti and Garatti, together with that of the German Cristoph Von Mayenburg, with the new Mathea, built by the Milanese shipyard S. Marco and powered by a Chervrolet with injection.
The race, full of suspense due to the continuous alternation of positions, initially saw Giorgio Guidotti in first position. Then, due to the breakage of an oil pipe, the driver was forced to retire, giving the lead to Von Mayemburg. Subsequently Dell'Orto, with the powerful Timossi-Ferrari, with a textbook overtaking in a turn, gets the better of the German driver, going on to win the race. Von Mayemburg, second classified, complains of a fault in a boot of his silver Mathea and, thanks to the timely return to the slipways, manages to avoid the sinking of the boat.
In third place we find another new 3 points, again from the S. Marco shipyard that the driver and builder Oscar Scarpa debuts on an experimental basis among the KD 800 kg. This prototype racer is intended to be the replica of the very successful Z 2500 cc limited class. An interesting experiment by Scarpa, suitable for a new restricted series of the maximum inboard class, which the FIM should follow up on. This beautiful hull is equipped with a BPM series "Atlantic sport" with 6 cylinders of 5800 cc and a power of around 225 HP. The Campione race program includes two races for the Z 2500 cc class racers, valid for the assignment of the Ezio Selva trophy. The great ace of motorboating deserves the credit for being the promoter of the Z 2500 cc class, in addition to having won, right on the waters of this lake, two world titles in the KD 800 kg. To honor Selva's memory, eight other pilots, with the exception of Petrobelli and Dino Celli, are competing: Castiglioni, Flavio Guidotti, Casalini, Crivelli, Paganin and Bonzi, with S. Marco-BPM boats, while Maderna and Cerutti with Timossi-BPM.
The final success goes to Cesare Maderna who, by winning both races, secures the coveted cup.

The European Championship
Returning to the KD 800 kg class, in 1958 the UIM also established the European Championship, with its first edition scheduled over a distance of 33 heats, as part of the two-day event in Messina called "IV Riunione Motonautica dello stretto".
Only four Italians were competing for the title in Sicilian waters: Nando Dell'Orto with his Timossi-Ferrari 4500 cc, Liborio Guidotti with the Timossi-Maserati 4500 cc, his son Giorgio and Franco Garatti, debuting this season in the 800 kg class with the Timossi-Maserati with a displacement of 3500 cc.
In the first heat, run on Saturday in incredibly calm waters, success smiled on Nando Dell'Orto although the surprising Garatti who made use of the famous Maria Luisa , owned by the Guidotti team, managed to keep the lead of the race for several laps. Dell'Orto catches up with Garatti with his powerful Ferrari, winning the race with a time of 11'49", at an average speed of 101.551 km/h. Garatti is 53" behind, while third, more than three minutes behind the winner, is Liborio Guidotti, slowed down by some mechanical problems. His son Giorgio is out of time, and his participation in this championship will leave no mark.
The following day, unfortunately, the weather conditions are very different: the strong wind, which had already risen in the early hours of the morning, has made the waters rather choppy. This has a significant impact on the performance of the drivers, who are already struggling to compete in sea water.
However, an exciting second heat emerges: Dell'Orto, in an attempt to catch up with Liborio Guidotti, who started in the lead, sees, at a certain point, his red Timossi-Ferrari rear up on a wave, then violently fall back into the water: this causes a hole to open on the bottom between the two boots. Dell'Orto approaches the shore and, also aided by the rapid intervention of the Coast Guard's vehicles, manages to save the vessel. Having eliminated his most fearsome opponent, Liborio Guidotti wins the second race, reducing his disadvantage over Garatti, once again second to 44". In the third and final heat, Liborio Guidotti, still in the lead, tries to extend his lead over Garatti and eventually wins the race, beating his opponent by more than a minute: he thus becomes the first continental champion in the history of the KD. It can be said that this was a deserved laurel that rewarded the efforts and audacity of the Milanese driver. Also commendable is Garatti's performance, which shows that he can figure well among the big names of inboard racing. After the disappointment of not having achieved a European result, Dell'Orto manages to boast the Italian KD 800 kg championship, thanks to the three consecutive successes achieved in the races in Venice, Luino and Lecco (even if,

In the Z 2500 cc inboard racing class, Dino Celli achieved victory, winning the national title with a boat built in his own shipyard in Mestre. In the future, in this category, Celli boats will achieve the highest number of victories.

The Pavia-Venezia Raid
In 1958, the first overall place achieved by the pilot Tarcisio Marega in the eighteenth Pavia-Venezia Raid caused much discussion. He once again entered the race together with his wife, Mrs. Amalia, his co-pilot, aboard a Timossi-BPM Marega hull, achieving this victory in a time of 3h10'28" with an average of 128.205 km/h, and embellished the performance by also winning the Coppa D'Oro Theo Rossi di Montelera, for the best speed achieved in the Piacenza-Cremona sector, with an average of 163.890 km/h. Behind the winners we find, in second position, Paolo Petrobelli (Timossi-BPM), followed by Guido Monzino (Timossi-Ferrari): the latter repeated the same placing obtained at the Raid the previous year. Worth noting is the withdrawal due to mechanical problems ofAugusto Cometti's Pelaochi.