Everything You Need to Know About LS, LSX, and Vortec Engines: Specs, History, Swaps, and More. ... This crate engine is rated at 533 hp and 477 lb-ft of torque. Steven Rupp.

A Quick Guide To GM's Ecotec3 5.3L V8 Engine: ... Operation and specs. ... The 5.3-liter Ecotec V8 produces 355 horsepower and 383 pound-feet of torque while providing fuel economy of 23 mpg ...

A member of GM’s latest small-block engine family, the 2014 Silverado and Sierra’s 5.3-liter EcoTec3 V-8 will produce an impressive 355 horsepower and 383 lb-ft of torque.

Since we are always talking about how economically sound these GM 5.3 LQ9 Engines are as an investment, we wanted to show you what you would need to do if you wanted to swap 1 into your project car.