The HTT Pléthore was supposed to be the first Canadian supercar, developed and produced by HTT Automobile in Quebec, Canada. However, the company has been inactive in recent years.
It debuted at the 2007 Montreal International Auto Show as a pre-production prototype under the name "Locus Pléthore", under the supervision of Luc Chartrand. It had a supercharged 6.2L V8 with 750 hp (559 kW) and 655 lb-ft (888 Nm) of torque or an optional high-performance homemade engine with 1,100 hp (820 kW). This engine was supported by Pratt & Miller and based on the supercharged V8 from the Corvette ZR1. The chassis and body were made entirely out of carbon fiber with no engine subframe, resulting in the chassis being exceptionally rigid. The car weighed approximately 1,089 kg (2,401 lb) and, if mated to the 1,300 hp (969 kW) engine, had a power-to-weight ratio equivalent to that of a Formula One race car. Two prototypes were constructed, and the second suggested a center seating position. HTT Automobile planned to custom build a limited lifetime production run of 99 Pléthores making 6-7 cars a year.
In 2013, the HTT Pléthore revamped the previous model with an even more powerful engine. HTT called it the LC-1300, for its supposed 1,300 horsepower as an 8.2L V10 taken from the Dodge Viper.
In the end, nothing was heard about this company or its models.