The front suspension parts were made by Alford & Alder in the United Kingdom, the rear axles were by Salisbury, brakes by Girling, and the steering by ZF.

It was also possible to specify Chrysler's slightly smaller but much more powerful Hemi engine; this was eventually made available to all High Speed models.

[3] As American manufacturers had to meet more stringent emissions standards at home, beginning at the end of the 1960s, the engines supplied to Monteverdi also became less and less powerful.

By 1974, Monteverdi claimed a top speed of only 200 km/h (124 mph) for the 375 L 2+2, and in period road tests not even this always proved achievable.

The first series, produced from 1967 to 1968, included a handful of coupés designed and built by Pietro Frua in Turin.

Some of the Monteverdi's details continued features of Frua's earlier work, with notable similarities to the Maserati Mistral and the British AC 428.

[6] The Frua-bodied High Speed 375 S was presented at the 43rd IAA in September 1967, in the Auto Becker booth, and received very positive reviews.

Alongside the regular two-seater coupé, Frua developed an extended version designed as a 2+2-seater on behalf of Monteverdi.

Coinciding with the 375 S, Monteverdi announced the availability of an even more powerful model with a version of Chrysler's "Magnum" eight-cylinder with twin four-barrel carburettors, which was to provide 400 PS (294 kW; 395 hp).

[8] In the spring of 1968, Peter Monteverdi considered a significant increase in annual output; Around 100 vehicles were planned per year.

From the summer of 1968 Monteverdi had a total of about ten bodies of Pietro Frua's design, produced at Carrozzeria Fissore.

For 1969, as a consequence of the lawsuit with Frua over unpaid royalties, Monteverdi had to design a new body for the High Speed models.

Unlike before, the pure two-seater would not be the volume model; Rather, various inquiries from prospective buyers had revealed that a 2 + 2 coupe on extended chassis was preferred.

In order to maintain the exclusivity of the High Speed series, Peter Monteverdi decided not to build the lower priced, smaller GT coupé.

Thus, the Monteverdi was about at the level of the British Jensen Interceptor, but did not match the performance of cars such as the Aston Martin V8 or the Maserati Indy.

Since the entire High Speed series was of handcrafted production, it can not be ruled out that Monteverdi executed detail designs to individual customer requirements.

One of them belongs today to the extensive car collection of the American talk show host Jay Leno.

The interior was fully upholstered in leather and equipped with air conditioning, power windows, and on request a Sony TV and a bar.

External details were repeatedly modified, sometimes to meet the ever changing regulatory landscape of the 1970s and sometimes in response to customer requests.

One late model, for example, was delivered with single rectangular headlamps borrowed from the Ford Granada, a matte black radiator grille, and rubber-covered bumpers.