Turn-Key 521 Ford


This 521 Big Block Ford Crate Engine is ideal for powering your heavy classic. Based on the 460 Ford, the 521 stroker pumps out 550 HP, well above the factory engine. The Ford 460 block is fitted with an all forged rotating assembly, hydraulic roller camshaft, aluminum heads and full roller rockers for maximum torque. This one comes completely turn-key with Holley Terminator X MPEFI, Holley Dual Sync distributor and MSD Box/Coil.

Payment Plans Available!paytommorrow_logo Turn-Key 521 Ford Big Block Crate Engine: F521-HR-TK-1Get Pre-Approved

Fuel Type

Fuel Type

Pump Gas


Idle Quality

Idle Quality

Best Use

Best Use

Horsepower: 550
Torque: 600
Bore/Stroke: 4.390 x 4.300
Compression: 10:1
Fuel Type: 91+ AKI (USA) / 95-98 RON
Block: 460 Ford Big Block
Crankshaft: 4340 Forged Steel
Rods: 4340 Forged H-beam
Pistons: Forged SRP
Bearings: King
Camshaft: Hydraulic Roller
Heads: Aluminum Edelbrock Performer RPM
Valves: -
Rocker Arms: Scorpion Racing Billet Aluminum Full Rollers
Intake: Edelbrock Victor EFI with fuel rails
Oil Pan: 7 Quart Street / Strip
Valve Covers: Cast Aluminum, Polished
Power Adder: Not Included
Fuel Delivery: Holley Terminator X MPEFI
Ignition: Dual Sync Distributor MSD Box/Coil
Dyno Testing Image

Dyno Testing

Dyno testing not included in long block price. Here at Prestige Motorsports, our “Dyno Promise” means that we dyno test every engine we build to verify the quality of our work, the integrity of each component, and the reliability of every engine we construct. Then, we deliver the dyno results for your project directly to you, the customer. Hours for dyno testing will be calculated with the purchase of the fuel and ignition group per engine order.

Engines will produce +/- 2% of advertised power at the flywheel. Advertised power levels are achieved using an electric water pump and specific induction and exhaust systems. Power will vary after pulley systems are installed or if changes are made to the induction or exhaust system (e.g. camshaft, cylinder head, compression, intake manifold, exhaust headers, air filters, etc.). Chassis dyno results measure power at the wheels and only calculate flywheel horsepower. Wheel horsepower is affected by a variety of vehicle-specific criteria including driveline design, body and chassis flex, air intake location, etc. Therefore, calculating flywheel horsepower from wheel horsepower is not an accurate representation of actual flywheel horsepower.

Warranty Image


This Prestige Motorsports engine is built to order and comes with a 3-year, unlimited miles warranty. Our warranty covers the base engine from intake manifold to oil pan.

Turn-Key 521 Ford Big Block Crate Engine: F521-HR-TK-1

Upgrades & Add-ons

Ready to upgrade your project? Add a kit from each area below to convert your base engine into a turn-key package. Kits come installed and dyno tested with your engine. Please note that not all of the options listed below are available for every engine. Contact us for more details.

Fuel Supply

Don’t waste time and frustration on that old carburetor. Fuel your engine with a dyno tested system for proven performance.

Ignition System

You'll need a top-notch ignition system for trouble-free performance. Let us customize one for you with everything needed to keep the spark alive.

Pulley Kits & Accessories

Pulleys drive vital components. Let us install a high-quality kit that keeps your engine running and provides max clearance for cooling systems. Available in multiple finishes!