Chevrolet Performance 454 HO Big Block Crate Motor - 425 HP/500 LB-FT - Forged Foundation Engine - Upgrade Ready Platform

Time-Tested Big-Block Foundation with Forged Strength

The 454 HO represents Chevrolet Performance's proven big-block foundation, delivering 425 horsepower and 500 lb-ft of torque with an all-forged rotating assembly that can handle serious power upgrades.

Key Specifications:

• Engine Type: Gen VI Big-Block V-8
• Displacement: 454 cu in (7.4L)
• Bore x Stroke: 4.250" x 4.000"
• Power: 425 horsepower at 5,000 rpm
• Torque: 500 lb-ft at 3,200 rpm
• Compression Ratio: 8.5:1
• Maximum RPM: 5,500 recommended

All-Forged Construction:

• Gen VI cast iron block with 4-bolt main caps
• Forged steel crankshaft for maximum strength
• Forged steel connecting rods
• Forged aluminum pistons
• One-piece rear main seal design

Conservative Performance:

• Cast iron oval-port cylinder heads
• Valve sizes: 2.190" intake / 1.880" exhaust
• Hydraulic roller camshaft for excellent drivability
• 8.5:1 compression ratio for pump gas compatibility

Foundation for Upgrades:

• Excellent foundation for power upgrades
• Popular foundation for aluminum head swaps
• Strong enough for significant camshaft upgrades
• Proven platform for custom builds