Roush DL427IRDSC 427 CI Individual Runner Street Engine

Description

Stuff massive 8-stack EFI big-block power into your late-model Fox chassis with the Roush DL427IRDSC 427 CI Individual Runner. This 7.0L small block utilizes a tall-deck Dart block packed with forged internals to crank out a staggering 560 HP while using a dual-sump pan to clear modern K-members effortlessly. Crowned with an 8-stack electronic fuel injection system, this engine delivers violent off-idle acceleration, unmatched throttle response, and a wicked high-RPM scream.

Key Features of Roush DL427IRDSC 427 CI

• Dual-Sump Oil Pan: Specifically designed to clear the crossmembers and steering racks found in 1979-1993 Mustangs.
• 8-Stack Individual Runner EFI: Features eight independent throttle bodies to maximize cylinder filling and deliver violently fast throttle response.
• 560 HP Dyno-Proven Output: Leaves the factory fully hot-tested to guarantee aggressive horsepower and massive stroker torque instantly.
• Dart Iron Eagle 9.5-Deck Block: Provides an ultra-rigid cast iron foundation that easily handles 560 HP without flexing.
• Forged 4.00-Inch Stroker Crank: Stretches the small block Ford architecture to 427 cubic inches for brutal low-end pulling power.
• CNC-Ported Aluminum Heads: Maximizes airflow port dynamics to feed the individual runner induction efficiently at high RPMs.

Component Breakdown: Dual-Sump 8-Stack 427 Long Block

This fully dressed small block gives you a bulletproof 427 cubic inch stroker foundation with exotic multi-throttle induction.

• The heavy-duty Dart block houses a fully forged rotating assembly and a custom high-lift hydraulic roller camshaft
• Ships fully assembled with CNC aluminum heads the 8-stack EFI system custom valve covers and a dual-sump oil pan

Vehicle Fitment & Compatibility Matrix

This 427 stroker drops into late-model Ford engine bays using standard 351W mounts. Securing an 8-stack Fox Body 427 stroker transforms your chassis into an exotic high-performance track weapon.

• Fits 1979-1993 Fox Body Ford Mustang restomods prepped for a 351W-based 9.5-deck small block engine
• Fits 1994-1995 SN95 drag chassis seeking a dyno-verified 560 HP naturally aspirated powerplant
• Fits custom tube-chassis Cobra replicas demanding authentic 427 cubic inches with modern 8-stack reliability
• Fits late-model custom street rod builds looking for a high-RPM fuel-injected engine upgrade

Fuel & Ignition System Requirements

Feeding an 8-stack fuel injection system requires dedicated high-pressure fueling and computer management.

• You must run a high-pressure electric fuel pump and return line capable of supporting 58 PSI at the fuel rails
• Requires a standalone engine management computer and custom wiring harness to drive the eight individual injectors

Installation, Break-In Oil & Priming Instructions

Follow strict modern engine startup rules to protect the tight internal bearing clearances of this 427 stroker.

• Use an SBF priming tool through the distributor hole to pump clean oil through the lifters before initial startup
• Fill the pan with conventional high-zinc break-in oil and run a varied RPM cycle to seat the piston rings

USA Warranty, Emissions & Logistics

This engine is a premium heavy-duty crate item shipped securely on a freight pallet directly to your shop.

• Backed by Roush Performance with a 2-Year or 24000-Mile warranty covering internal engine components
• Not emissions-legal on modern street cars built strictly for pre-emissions classics and closed-course racing