At 9.37 liters, the ZZ572 is the mac daddy of all big block engines. It’s nearly a 1-liter EcoBoost larger than any engine ever fitted to a production vehicle (the 8.4-liter V10 in the dearly departed Dodge Viper). Naturally, that means it’s got loads of power 727 horsepower and 680 torques but those aren’t the most impressive specs.
GM has been producing small-block and big-block engines for decades. Throw a few extra parts on one of these bad boys and you’ll be burning tires in no time. Before we talk about the best GM crate engines, let’s start by answering a few basic questions. Ooh, shiny. (source)
The alternative is to either rebuild an old engine yourself, have an engine builder do it for you, or buy a custom-made engine directly from an engine builder. Each of these options has a fair share of hurdles, and often it’s cheaper to order a crate engine than it is to go those other ways.
The single engine option in the latest models is a 3.6L V6 that offers 283 hp and 260 lb-ft of torque. The powerplant is mated to a six-speed automatic. The duo offers 25 mpg on the highway. That is solid fuel economy, if you can stand all of the cabin noise.