The GMC 'Twin Six' Is An Insane 11.5-Liter Four-Head V12 Meant To

The GMC Twin Six is the monstrous 11.5-liter all-American gasoline-powered V12 that you need to know about.

Comments - Review: 2024 GMC Terrain SLT AWD

GMC's Remarkable Twin Six Engine: The Story Behind General Motor's Monstrous V12

Flashback Friday: GMC's Monster 702ci V12 “Twin-Six” engine

GMC's Low RPM Gasoline 11.5-litre V12

The Engine Appreciation Thread (Awesome, Unique, Odd, Historic, etc..all in here)

The Engine Appreciation Thread (Awesome, Unique, Odd, Historic, etc..all in here)

Comments - Review: 2024 GMC Terrain SLT AWD

GMC's Remarkable Twin Six Engine: The Story Behind General Motor's Monstrous V12

V12 Archives - The Autopian

The GMC Twin Six V12: 702 Cubes, 275 HP At 2400 RPM, 630 Ft. Lbs. At 1600 RPM - Curbside Classic

GMC's Low RPM Gasoline 11.5-litre V12

The GMC Twin Six V12: 702 Cubes, 275 HP At 2400 RPM, 630 Ft. Lbs. At 1600 RPM - Curbside Classic

The Engine Appreciation Thread (Awesome, Unique, Odd, Historic, etc..all in here)

Ultimate LT1 Engine Guide