Show Financing?: Yes

489 Marine Short Block

Starting at $4,499

Based on the 454 Big Block Chevy, our 489 stroker offers a longer stroke which boosts torque and horsepower output to get your heavy classic out of the hole and moving quickly. The 489 short block will fit directly in place of a 396 or 454, and accepts standard Big Block Chevy engine parts. A 110cc combustion chamber or larger is recommended for pump gas use.

Payment Plans Available!paytommorrow_logo 489 Chevy Big Block Short Block Marine Engine: C489-M-SB Get Pre-Approved

Horsepower: Up to 650
Torque: Up to 600
Bore/Stroke: 4.280 x 4.250
Compression: Varies with Chamber Size
Fuel Type: Varies with Chamber Size
Block: OEM 454, Gen V/VI
Crankshaft: 4340 Forged Steel
Rods: H-Beam, 4340 Forged Steel
Pistons: 4032 Forged Aluminum 18cc dome
Bearings: Clevite H-Series Coated
Camshaft: Not Included
Heads: Not Included
Valves: Not Included
Rocker Arms: Not Included
Intake: Not Included
Oil Pan: Not Included
Valve Covers: Not Included
Power Adder: N/A
Fuel Delivery: Not Included
Ignition: Not Included
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Dyno Testing

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.

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.

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Warranty

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.

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!