Chevrolet Performance’s CT400 long block 604 crate motor (part no. 88869604) offers 5.7L/350 CID with approximately 9.72:1 compression, 404 hp at 5,600 rpm, and 406 ft.-lbs. of torque at 4,600 rpm. Boasting a recommended max rpm of 5,800 and equipped with Fast Burn cylinder heads with LS-style beehive valve springs, this circle track crate engine is designed for excellent high-rpm performance and durability. The included camshafts are steel hydraulic roller style and feature .474-inch intake lift and .510-inch exhaust lift. Camshaft intake duration at .050-inch lift is 208 degrees, and exhaust duration is 221 degrees. Other features include:

• Cast-iron block with 4-bolt main caps
• Forged steel, shot-peened crankshaft
• Powdered-metal steel connecting rods
• Hypereutectic aluminum pistons
• Fast Burn aluminum cylinder heads with 62cc chambers
• 2.00-inch intake valves and 1.55-inch exhaust valves
• 1.5:1 rocker arm ratio