Edelbrock 49557 Edelbrock/Musi 555 RPM XT EFI 723 HP

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.

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Technical Specifications

Designed for maximum horsepower & seamless EFI tuning!

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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

Ensure compatibility with your vehicle before purchasing.

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Installation Notes & Recommendations

Professional Installation Recommended – Requires proper break-in procedure
⚙️ Pre-Tuned for Performance & Driveability – Minimal tuning adjustments needed
Use the Bluetooth E-Tuner App for Real-Time Adjustments

⚠️ Some additional components may be required for full installation.

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❓ Frequently Asked Questions (FAQ)

Is this engine fuel injected or carbureted?

• This engine comes with the Pro-Flo 4 XT Electronic Fuel Injection system.

Does this engine require a computer?

• Yes, the included ECU controls the EFI system and ignition timing.

Can I tune this engine with the included tablet?

• Yes, the 7″ Android tablet connects via Bluetooth for real-time tuning & adjustments.

What vehicles does this engine fit?

• It fits most Big Block Chevy applications but requires custom mounting for some models.

What fuel octane is recommended?

• Premium 91+ octane is recommended for optimal performance.

Does this engine work with stock accessories?

• Some modifications may be required for belt & bracket fitment.

What kind of oil does this engine use?

• Use high-zinc break-in oil for the first 500 miles, then switch to high-performance synthetic.

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Order Your Edelbrock/Musi 555 Pro-Flo 4 XT Crate Engine Today!

Dominate the street & track with this dyno-tested, EFI-powered 555 C.I.D. Big Block!

✔ 723 HP & 652 lb-ft Torque
✔ Self-Tuning Pro-Flo 4 XT EFI System
✔ Forged Internals for Extreme Durability
✔ Bluetooth ECU with Real-Time Adjustments

DON’T WAIT – LIMITED AVAILABILITY! ORDER NOW!

Edelbrock 49557 details

 

KEY SPECS
MFG. Part #	49557
Brand	Edelbrock
Crate Engine Type	Long Block
Engine Displacement	555 cu. in.
Compression Ratio	10.0:1
Camshaft Type	Hydraulic Roller Tappet
Cylinder Head Material	Aluminum
Carburetor Included	No
Intake Manifold Included	Yes
Distributor Included	Yes
Valve Covers Included	Yes
Engine Balance	Internal/External
Cylinder Heads Included	Yes
Rear Main Seal Style	1-piece
Throttle Body Included	Yes
Oil Pan Included	Yes
Timing Cover Included	Yes
Water Pump Included	No
Harmonic Balancer Included	Yes
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
GENERAL
Assembled	Yes
GTIN Code	085347495573
Notes	Self tuning multi-port sequential injection.
Sold in Quantity	Each