Isiac Renteria, Richard Renteria, and Osvaldo Esparza-Guerrero pleaded guilty to several counts, including felony arson.
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They were each sentenced to eight years suspended prison, with credit for three years served in custody.
A fourth defendant, Breane Ojeda, was sentenced to just over three years.
RELATED: Four Visalia residents charged for allegedly setting Pier Fire
The massive blaze tore through Tulare County in 2017, forcing hundreds of mountain residents to evacuate their homes.
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Detectives later learned the defendants deliberately set fire to a stolen car to destroy it, which ignited the flames that led to $40 million in damages.
The four convicted arsonists were also ordered to pay more than $40 million in restitution.