The least expensive crate engines sold by Chevrolet as of 2016 are the 350/290 Deluxe, the LC9 and the C3T350. All of these are small-block, naturally aspirated V-8 engines sold without transmissions that produce between 300 and 350 horsepower and 300 to 400 foot-pounds of torque.
The 350/290 Deluxe is the most economical crate engine sold by Chevrolet as of 2016. Its peak output of 300 horsepower comes from 4-inch cylinders and a 3.48-inch stroke length, resulting in a 350-cubic-inch total displacement. The 350/290 Deluxe uses cast aluminum pistons, has an 8:1 compression ratio and has a recommended redline of 5300 rpm.
The LC9 crate engine is an LS-series Generation IV motor that displaces 327 cubic inches. Despite its smaller displacement as compared to the 350/290 deluxe, it has a higher power output than the larger engine at 320 peak horsepower. However, the peak torque of the LC9 and 350/290 Deluxe is comparable at 310 foot-pounds. The LC9 has a symmetrical bore and stroke length of 3.6 inches, a compression ratio of 9.5:1, and a recommended redline of 6000 rpm.
The CT350 crate engine is a 350-cubic-inch engine designed especially for circle-track racing. It has an identical bore and stroke length to the 350/290 Deluxe but a higher compression ratio of 9.2:1, resulting in a peak of 350 horsepower and 390 foot-pounds of peak torque. The CT350 uses hypereutectic aluminum pistons and a recommended redline of 5500 rpm.