427W 550HP Stack-Injected SBF Stroker Engine – EFI Crate Motor

The 427W Stack-Injected Small Block Ford stroker engine is a premium 550 horsepower crate engine engineered for builders who want modern EFI precision, aggressive performance, and the unmistakable look and sound of individual throttle stack injection. Built from a fully machined 351 Windsor roller block, this engine delivers race-bred power with excellent drivability and recognized reliability.

Each engine is professionally assembled, fully balanced, photo-documented during the build, and backed by a 2-year unlimited-mileage warranty.

Engine Overview

• Engine Type: Small Block Ford (351W-based)

• Displacement: 427 Cubic Inches

• Power Output: Approx. 550 Horsepower

• Induction: Stack-Injected EFI (Individual Throttle Bodies)

• Condition: Brand new, custom-built crate engine

• Warranty: 2 Years – Unlimited Miles

Ideal for high-end street builds, restomods, hot rods, and performance applications where appearance and power matter equally.

Short Block & Rotating Assembly

• Fully machined, seasoned 351W Ford roller block

• Block finished with three coats of high-temperature ceramic engine paint

• Forged steel stroker crankshaft, 4.170″ stroke (Eagle or Scat)

• Forged connecting rods (Eagle or Scat)

• Forged performance pistons (Icon, Mahle, or SRP)

• Performance rod and main bearings (Clevite, King, or Federal Mogul)

• Hand-filed performance piston rings

• ARP main bolts

• Complete rotating assembly precision balanced

• Three-piece double roller timing set

Built for high RPM stability and long-term durability under aggressive power levels.

Camshaft, Valvetrain & Heads

• Custom-ground hydraulic roller camshaft

• Hydraulic roller lifters

• Chrome moly pushrods

• Performance roller rocker arms

• Screw-in studs with hardened guide plates

• High-performance aluminum cylinder heads (AFR or Edelbrock)

Optimized airflow ensures strong mid-range torque and exceptional top-end horsepower.

Stack EFI Induction & Engine Management

• As-cast stack induction system (Borla or InnoV8)

• Holley Terminator X ECU, professionally calibrated

• Main ECM engine wiring harness

• Fuel injector harness

• High-flow fuel injectors

• Manifold Air Pressure (MAP) sensor

• Intake Air Temperature (IAT) sensor

• Engine Coolant Temperature (ECT) sensor

• Wide-band O₂ sensor

This EFI system delivers instant throttle response, precise fuel control, and reliable cold starts, while preserving the iconic look of classic stack injection.

Ignition System

• Holley dual-sync distributor (CDI box required)

• MSD ignition coil with mounting bracket

• Spark plugs

• Ignition wires

• Wire looms

Oil System, Cooling & External Components

• Melling high-performance oil pump with pickup screen

• Front sump oil pan

• Aluminum timing cover with timing scale

• Performance harmonic balancer

• Aluminum valve covers with baffles (polished or black)

• Valve cover breathers (polished or black)

• Fuel pump block-off plate

• Water pump matched to application

• Dipstick and tube

• Oil filter

• 6 quarts of engine oil included

Build Quality & Documentation

• Engines are photo-documented throughout the entire assembly process

• Built using premium, proven performance components

• Designed for high-end street performance with race-inspired power delivery

Ideal Applications

• High-end restomods

• Hot rods and customs

• Street/strip performance builds

• Show cars requiring visual impact and modern EFI performance

The 427W 550HP Stack-Injected SBF Stroker Engine combines modern EFI technology, classic stack-injection styling, and brutal V8 performance, making it a standout choice for builders seeking power, precision, and show-quality presentation—backed by a 2-year unlimited mileage warranty.