Porsche’s mid-engine Cayman coupe has nipped at the heels of the 911 in terms of dynamics almost since the day it was created, and now that tiff may be about to break out into al all-out fistfight. A Motor Trend report suggests Porsche is working on a super-high-performance Cayman variant along the lines of the hard-core 911 GT3—and that it’ll likely be called GT4.

While a potential Cayman GT4 makes sense in a vacuum, in the context of Porsche’s current lineup, it’s a bold move. That’s because Porsche has been extremely careful to keep the Cayman’s output figures and performance just beneath those of the 911. We’ve said it before and we’ll said it again: The Cayman can handle much more gusto than it’s been given. And it appears the GT4 would finally tap that potential while breaking through the Porsche’s glass performance ceiling.