New Hampshire drivers: Don’t scrape off that windshield sticker just yet.

A manufacturer of vehicle emissions testing equipment sued the state Monday, asking a federal judge to block the repeal of New Hampshire’s annual motor vehicle inspection requirement, which is set to take effect in February.

The lawsuit was filed by Gordon-Darby, the Kentucky-based emissions testing company that has overseen New Hampshire’s inspection mandate since 2004. The company alleges that ending the decades-old testing of tailpipe emissions would violate the Clean Air Act unless the state first obtains federal government approval.

Republicans in the Legislature included the repeal of annual inspections as part of the state budget. They argued that the mandatory inspections were unnecessary and don’t improve

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