Tuthill 911K, based on a 1970 Porsche 911 shell.
Builds & Projects

This Porsche Flat-Six Goes to 11

Tuthill's 911K takes a 1970 Porsche 911 shell and builds a 3.1-liter air-cooled flat-six that screams to 11,000 rpm inside a 1,900-pound carbon fiber body.

Tabitha Corman · Jul 1, 2026