The Lotus Evora returns for the 2017 model year, now in Evora 400 and limited edition Evora 410 form.

The cars, which go on sale in May, both feature a supercharged 3.5-liter V-6.

Lotus CEO Jean-Marc Gales has now revealed that the United States will get a third, entry-level Evora powered by a naturally-aspirated version of the V-6, which Lotus sources from Toyota. Without the supercharger, fuel economy will improve but performance will be hurt.

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Speaking with Automotive News (subscription required), Gales explained that Lotus needs to reduce carbon dioxide emissions of its fleet to meet the latest CAFE standards.

“Over a five-year period in the U.S. we have to show a 3 percent per year reduction in carbon dioxide emissions,” Gales is quoted as saying. “One option is remove the supercharger.”

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Another option would be dropping in a smaller engine, though Gales would prefer to avoid engine downsizing. He pointed to McLaren offering the same engine across multiple models, albeit with different states of tune.

Lotus is expecting to sell just 400 Evoras in the U.S. annually. The 400-horsepower Evora 400 starts at $89,900. The entry-level version would be priced lower but Gales wasn’t willing to reveal when it will be offered. He did say that a convertible Evora was coming in 2017, though.