By now, you’ve seen the new 2024 Mustang, which Ford Motor Company revealed recently in Detroit. And while the 5.0 Coyote V-8 remains the current hero of the GT lineup, there was another V-8 Mustang seen lurking around Detroit over the past few weeks that gained lots of attention.

This pony was an Avalanche Gray Shelby GT350 with an unusual sound and a massively bulged hood that seemed to be hand-fabricated and potentially hiding a Ford prototype engine. For obvious reasons, the hood earned the Mustang the nickname “rhino” as it made its way across the Internet. Most suspected it was an actual Ford vehicle, which was confirmed when it was spotted on display in the Ford Performance booth at the Woodward Dream Cruise. And while the Mustang was clearly there for everyone to see, no one knew what lurked beneath the hood.

Like most, we were curious and had to investigate. Thankfully, we had an insider who was able to lift the bonnet and find answers.

Keep reading to discover the reason for the rhino.