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

Once upon a time, GMC created a V12 monster of an engine it called the Twin Six. It was massive, powerful, and not eco-friendly in the least.
Once upon a time, GMC created a V12 monster of an engine it called the Twin Six. It was massive, powerful, and not eco-friendly in the least.

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

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

Were there any mass-produced American cars with a six-cylinder engine before or during World War II? - Quora

What was the GMC Twin Six?, The Daily Drive

The world's most powerful cars: 1,000-horsepower minimum

Certainly one of the most unusual engines of its day, the GMC TwinSix V12 appears to be a pair of 60-degree V6 engines welded togeth…

GM's Final V12 Was an Obscure 11.5-Liter Truck Engine From the 1960s

Alvin Reyes - SlashGear

Alvin Reyes - SlashGear