Porn Valley- Call out the tow trucks: A 60-foot black-and-white billboard showing Chloe Sevigny pleasuring Vincent Gallo was unveiled Saturday on Hollywood’s Sunset Blvd.

The steamy and controversial ad, plugging a notorious scene in the upcoming “X-Rated Adults Only” flick “The Brown Bunny,” which opens next month, went up near the famed Chateau Marmont Hotel. Wonder what they’ll charge for a room with a view.

“The film is about a broken-down love, so I thought…this image represents a lot of conflict,” Gallo told us. “I feel that there is an extremely complicated subtext to what they are doing.”

Morning commuters might not be the only ones getting a shock from the picture. Gallo, who also wrote, produced and directed the film, said he “doesn’t think Chloe has seen [the image].”

(We sent a copy of the billboard with a request for comment to Sevigny’s agent, but no response was forthcoming.)

And Gallo thinks this should just be a start: “Chloe is one of the most beautiful and talented people in the world; she should be on 10 billboards on Sunset Blvd.”

However, local leaders – many of whom view the billboard as pornographic – are threatening to protest the promo and are promising to bring it down.

Gallo is now in New York and says he will attend the Republican National Convention later this month.

“I’m here trying to help out in any way that I can. I have made it clear that I am open in any way to promote and protect the Republican administration,” he said.

Well, the GOP, which openly supports and courts the Religious Right, might very well greet him with a chorus of:

“Mr. Gallo, tear down that billboard!”