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502 HO

$8,511

MSRP

461 HP

@ 5100 RPM

12568778

PART NO.

558 LB-FT

@3400 RPM

Affordable Big-Block performance with huge torque and 461 hp

With 461 horsepower and 558 lb-ft of torque, our 502 HO crate engine has power on tap for every need — whether it’s a ’69 Chevelle at the drag strip or the Suburban that towed it there.

 

The 502 HO is all about torque and it hovers at the 558 lb-ft mark at only 3400 rpm and arcs gently above the 500 lb-ft level by 2800 rpm, remaining there through 4200 rpm. All those axle-twisting pound-feet are rooted in a stronger, updated four-bolt cylinder block that houses a forged steel crankshaft, forged and shot-peened rods, and forged aluminum pistons. In other words, it’s a super-stout assembly that is as durable as it is powerful.

 

Iron, rectangular-port cylinder heads keep the 502 HO affordable, and our crate engine assembly includes an aluminum dual-plane intake manifold, a water pump, 14-inch flexplate, balancer, and more. You add the carburetor, starter, and ignition system.

Connect & Cruise Powertrain System

Connect & Cruise Crate Powertrain Systems provide factory-matched engine-and-transmission combinations that include specially calibrated controllers and wire harnesses designed for retrofit installations in older vehicles. Connect and Cruise packages are available for a wide variety of crate engines which can be paired with an automatic or manual transmission.

Tech Specs

Part Number: 12568778

Engine Type: Chevy Big-Block V-8

Displacement (cu. in.): 502

Bore x Stroke (in.): 4.470 x 4.000

Block (P/N 19170540): Cast-iron with four-bolt main caps

Crankshaft (P/N 10183723): Forged steel

Connecting Rods (P/N 19170198): Forged steel, shot peened

Pistons (P/N 12533507): Forged aluminum

Camshaft Type (P/N 24502611): Hydraulic roller

Camshaft Lift (in.): .510 intake / .540 exhaust

Camshaft Duration (@.050 in.): 211° intake / 230° exhaust

Cylinder Heads (P/N 12562920): Iron rectangular port; 118-cc chambers

Valve Size (in.): 2.190 intake / 1.880 exhaust

Compression Ratio: 8.75:1

Rocker Arms (P/N 12523976): Stamped steel

Rocker Arm Ratio: 1.7:1

Water Pump (P/N 19168606): Cast-iron, long-style

Flexplate (P/N 10185034): 14"

Recommended Fuel: 92 octane

Ignition Timing: Base 8° BTDC, 30° Total

Maximum Recommended rpm: 5500

Balanced: External

Installation Guides

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*The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges.


Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance Parts may not meet Federal Motor Vehicle Safety Standards and emissions regulations and should not be operated on public roads. Chevrolet Performance customers are responsible for ensuring their use of Chevrolet Performance complies with applicable federal, state, and local laws, regulations, and ordinances. Many parts intended for racing or other “off-highway” use are not designed or tested for crashworthiness or to meet the safety needs of the motoring public, and may adversely affect the original intended performance or handling characteristics of the vehicle. These parts are designed and intended to be used with experts supervising their installation and use, to help assure the proper and safe operation of the vehicle.

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*The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges.


Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance Parts may not meet Federal Motor Vehicle Safety Standards and emissions regulations and should not be operated on public roads. Chevrolet Performance customers are responsible for ensuring their use of Chevrolet Performance complies with applicable federal, state, and local laws, regulations, and ordinances. Many parts intended for racing or other “off-highway” use are not designed or tested for crashworthiness or to meet the safety needs of the motoring public, and may adversely affect the original intended performance or handling characteristics of the vehicle. These parts are designed and intended to be used with experts supervising their installation and use, to help assure the proper and safe operation of the vehicle.