489 Chevy Marine Long Block

$9,999

Our 489 Big Block Marine Engine is an affordable step up from a basic Chevy crate engine. The 454 based stroker engine is designed to provide maximum torque from 2,500 to 5,550 RPM, right where you need it on a boat. Get on plane quicker in the water or blow over dry land easier on your airboat.

Fuel Type

Fuel Type

Pump Gas
Max RPM

Max RPM

6,000
Idle Quality

Idle Quality

Lopey
Best Use

Best Use

Airboat
Horsepower: 550
Torque: 575
Bore/Stroke: 4.280 x 4.250
Compression: 10:1
Fuel Type: 91+ AKI (USA) / 95-98 RON
Block: OEM 454, Gen V/VI
Crankshaft: 4340 Forged
Rods: H-Beam, 4340 Forged Steel
Pistons: 4032 Forged Aluminum 18cc dome
Bearings: Clevite H-Series Coated
Camshaft: Hydraulic Roller
Heads: Aluminum, As-Cast Oval Port
Valves: Ferrea Super Alloy Exhaust, 6000 Series Intake
Rocker Arms: Billet Aluminum, Full Roller, Girdled
Intake: Not Included
Oil Pan: Marine
Valve Covers: Polished Aluminum, Dual Breathers
Power Adder: N/A
Fuel Delivery: Not Included
Ignition: Not Included
Dyno Testing Image

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.

Dyno Graph Image
Warranty Image

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.

Comparable Engines

Product: Current: 489 Chevy Marine Long Block 582 Marine Engine 632 Marine Engine
Horsepower: 550 650 750
Torque: 575 725 825
Best Use: Airboat Airboat Airboat
Max RPM: 6,000 6,000 6,000
Idle Quality: Lopey Lopey Lopey
Bore/Stroke: 4.280 x 4.250 4.600 x 4.375 4.600 x 4.750
Block: OEM 454, Gen V/VI Aftermarket 9.8 Deck, Iron Aftermarket 10.2 Deck, Iron
Crankshaft: 4340 Forged 4340 Forged Steel 4340 Forged Steel
Rods: H-Beam, 4340 Forged Steel H-Beam, 4340 Forged Steel H-Beam, 4340 Forged Steel
Pistons: 4032 Forged Aluminum 18cc dome 2618 Forged Aluminum 10cc dome 2618 Forged Aluminum 3cc valve relief
Oil Pan: Marine Marine Marine
Camshaft: Hydraulic Roller Hydraulic Roller Hydraulic Roller
Heads: Aluminum, As-Cast Oval Port Aluminum, As-Cast Rect Port Aluminum, CNC Rect Port
Intake: Not Included Not Included Not Included
Price: $9,999 Starting at $13,999 Starting at $16,999

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!