427 LS Next Boost Ready Long Block


Our ‘Power Adder Series” is designed specifically to be able to add a Supercharger or Turbo(s), taking performance and horsepower to the extreme. This combination utilizes the industry leading Dart LS Next SHP block, all forged internals, and 9.5:1 compression to ensure your boosted application can thrive. Our LS3 cylinder heads and in-house designed camshaft makes this boost ready long block at home on the track or in a wicked street machine.

Payment Plans Available!paytommorrow_logo 427 LS Next Boost Ready Engine: L427-B1-LB4Get Pre-Approved

Fuel Type

Fuel Type

Pump Gas


Idle Quality

Idle Quality

Best Use

Best Use

Power Adder
Horsepower: Capable of 800+
Torque: Varies
Bore/Stroke: 4.125 x 4.000
Compression: 9.5:1
Fuel Type: Premium Pump Gas
Block: Dart LS Next SHP
Crankshaft: 4340 Forged Steel
Rods: 4340 Forged H-Beam
Pistons: 2618 Forged Aluminum
Bearings: King XP
Camshaft: Hydraulic Roller
Heads: Aluminum LS3 - CNC Ported
Valves: 2.165 / 1.590
Rocker Arms: Steel / Roller Trunion Upgrade
Intake: Not Included
Oil Pan: Chevy Performance Muscle Car
Valve Covers: Not Included
Power Adder: Not Included
Fuel Delivery: Not Included
Ignition: Not Included
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.