Edelbrock/Musi 555 Pro-Flo 4 XT EFI Crate Engine – 723 HP Big Block Powerhouse!

Unleash 723 HP & 652 LB-FT Torque with the Edelbrock/Musi 555 Crate Engine!

• Block has a 9.8″ deck height and a 10.0:1 compression ratio
• This 555 c.i. engine puts out an astonishing 723 horsepower and 652 ft. lb. of torque
• System also includes fuel injectors, fuel rails, fuel pump, throttle body, electronic engine control unit (ECU) and 7″ Android tablet with pre-loaded E-Tuner app and calibrations
• Includes a front mount 90mm throttle body design manifold with a large plenum and tapered runners that deliver more horsepower and torque than a traditional single-plane intake manifold
• The E-Tuner app uses a Bluetooth wireless connection to communicate with the ECU’s self-learning capability to continually adjust the calibration to get the maximum performance of your engine

What’s Included in the Edelbrock 555 Crate Engine?

9.8″ Deck Height Big Block – Rugged & durable cast-iron construction
Forged Steel 4.250” Crankshaft – Maximum strength & reliability under extreme conditions
Forged Pistons for High Performance – Superior durability & compression consistency
Edelbrock E-CNC Aluminum Cylinder Heads – Precision-machined for increased power output
Rollin’ Thunder Hydraulic Roller Camshaft (#2264) – Perfect balance of torque & high-RPM power
90mm Throttle Body – Large front-mount design for improved airflow & efficiency
Pro-Flo 4 XT Multi-Port EFI System (#35883) – Delivers race-level fuel atomization & throttle response
E-Tuner Bluetooth App for Live Calibration – Wireless ECU adjustments for ultimate performance
Distributor Included – Ensures precise ignition timing
Oil Pan, Timing Cover, & Harmonic Balancer – Complete package for hassle-free installation
2-Year Unlimited Mileage Warranty – Peace of mind for performance enthusiasts

Excludes water pump, flexplate, flywheel, spark plugs, and air cleaner.

Technical Specifications

Feature	Details
Brand	Edelbrock
Manufacturer’s Part #	49557
Product Type	Long Block Crate Engine
Summit Racing Part #	EDL-49557
Crate Engine Family	Chevy Big Block
Actual Displacement	9.1L / 555 C.I.D.
Horsepower	723 HP
Torque	652 lb-ft
Compression Ratio	10.0:1
Assembled?	Yes
Camshaft Type	Hydraulic Roller
Cam Lift (Int./Exh.)	.594 in. intake / .594 in. exhaust
Cam Duration @ 0.50	242° Intake / 240° Exhaust
Cylinder Heads Included?	Yes (Edelbrock E-CNC Aluminum Heads)
Fuel System	EFI (Pro-Flo 4 XT Multi-Port)
Distributor Included?	Yes
Valve Covers Included?	Yes (Cast Aluminum)
Timing Cover Included?	Yes
Oil Pan Included?	Yes
Harmonic Balancer Included?	Yes
Water Pump Included?	No
Flexplate Included?	No
Flywheel Included?	No
Air Cleaner Included?	No
Spark Plugs Included?	No
Spark Plug Wires Included?	No
Computer Included?	Yes
Wiring Harness Included?	Yes
Supercharger Included?	No
Warranty	2 Years / Unlimited Miles
Sold As	Individual Engine

Designed for maximum horsepower & seamless EFI tuning!

Fitment & Compatibility

✔ Designed for Big Block Chevy Applications (Camaro, Chevelle, Nova, C10, etc.)
✔ Ideal for muscle cars, drag racing, and high-performance street builds
✔ Works with both automatic and manual transmissions
✔ Advanced EFI system for improved fuel economy & throttle response