The rear suspension consisted of De Dion axle with twin radius arms and transverse leaf spring.

After this race the car was modified, reengined and renamed as the 412 S.[4] The only example of the Ferrari 412 S was created on the 312 S' experimental chassis, combined with the 412 MI-sourced engine.

[6] The car was built exclusively for John Von Neumann, a Ferrari of California distributor, and delivered in September 1958.

Von Neumann paid twice the price of the new Ferrari 250 TRs and was created expressly to be able to compete against Reventlow's Scarabs of American SCCA racing series.

At the rear the 412 S had De Dion axle with twin radius arms, transverse leaf spring and hydraulic shock absorbers.

[10] John von Neumann took the delivery of the 412 S in 1958, in USA, and campaigned the car in 1958 USAC Road Racing Championship under Ferrari Representatives of California team.

[12] In October 1958, the car was entered in Los Angeles Times Grand Prix, a championship race at Riverside.

II-Chevrolet and four seconds quicker than von Neumann's Ferrari 335 S.[13] The start of the race Hill and Chuck Daigh traded the leading position many times.

When the mechanical fuel pump overheated the electric one failed to work in time and forced Hill to pit on his 21st lap.

The 1958 United States Grand Prix for Sports Cars was ultimately won by the Reventlow's Scarab with Ferrari 375 Plus, driven by a future champion Dan Gurney, on second place.

Ginther scored the fastest qualifying time and in the race won against smaller engined Porsche 718 RSKs.

During the final race, the Nassau Trophy, Englebert tires degraded quickly on the coral surface and failed after 15 laps.

[14] In 1961, Frederick Knoop continued to campaign the car in SCCA racing, scoring third place at Riverside preliminary heat and second at main event.