427 Chevy Marine Long Block

Starting at $9,999

Prestige Motorsports has developed a line of airboat engines that will leave the competition stuck on dry land. Our 427 Chevy Small Block Marine Engine is designed specifically for airboats and will provide big block power in a bullet-proof small block package.

Fuel Type

Fuel Type

Pump Gas
Max RPM

Max RPM

6,000
Idle Quality

Idle Quality

Lopey
Best Use

Best Use

Airboat
Horsepower: 530
Torque: 525
Bore/Stroke: 4.125 x 4.000
Compression: 10:1
Fuel Type: Pump Gas, 93 AKI (USA) / 98 RON
Block: Aftermarket 350, 4-Bolt Splayed Iron
Crankshaft: 4340 Forged Steel
Rods: H-Beam, 4340 Forged Steel
Pistons: 2618 Forged Aluminum 16cc dish
Bearings: Clevite Coated
Camshaft: Hydraulic Roller
Heads: Aluminum, CNC
Valves: Ferrea Super Alloy Exhaust, 6000 Series Intake
Rocker Arms: Billet Aluminum, Full Roller, Endurance
Intake: Edelbrock RPM Air Gap
Oil Pan: Polished Aluminum, Dual Breather
Valve Covers: Cast Aluminum, Polished
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.

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: 427 Chevy Marine Long Block 408 Marine Engine 383 Marine Engine
Horsepower: 530 470 420
Torque: 525 515 450
Best Use: Airboat Airboat Airboat
Max RPM: 6,000 6,000 6,000
Idle Quality: Lopey Lopey Lopey
Bore/Stroke: 4.125 x 4.000 4.030 x 4.000 4.030 x 3.750
Block: Aftermarket 350, 4-Bolt Splayed Iron OEM 350, 4-Bolt Gen II OEM 350, 2-Bolt Gen II
Crankshaft: 4340 Forged Steel 4340 Forged Steel Cast Steel
Rods: H-Beam, 4340 Forged Steel H-Beam, 4340 Forged Steel H-Beam, 4340 Forged Steel
Pistons: 2618 Forged Aluminum 16cc dish 4032 Forged Aluminum 16cc dish 4032 Forged Aluminum 5cc valve relief
Oil Pan: Polished Aluminum, Dual Breather Extra Capacity, Windage / Oil Control Extra Capacity, Windage / Oil Control
Camshaft: Hydraulic Roller Hydraulic Roller Hydraulic Roller
Heads: Aluminum, CNC Aluminum, As-Cast Aluminum, As-Cast
Intake: Edelbrock RPM Air Gap Not Included Not Included
Price: Starting at $9,999 Starting at $8,499 Starting at $7,499

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!