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Inspected & Documented
Condition notes recorded before palletizing.
30-Day Startup Warranty
Covers block, heads and internal moving components.
In Stock & Ready to Freight
Crate Engines
Edelbrock 49557 Edelbrock/Musi 555 RPM XT EFI 723 HP
$16,295.28
+ $295.00 flat-rate insured LTL freight
(details)
$16,590.28 delivered to the continental US
- Palletized and heavy shrink-wrapped for freight
- LTL carrier delivery with optional liftgate service
- Ships in 1–2 business days from Los Angeles, CA
- Transit typically 3–7 business days, continental US
Secure checkout by Stripe
Need a matched transmission, controls or wiring package? Speak with a parts specialist.
Details & Inspection Notes
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 BlockRugged & durable cast-iron construction
Forged Steel 4.250” CrankshaftMaximum strength & reliability under extreme conditions
Forged Pistons for High PerformanceSuperior durability & compression consistency
Edelbrock E-CNC Aluminum Cylinder HeadsPrecision-machined for increased power output
Rollin’ Thunder Hydraulic Roller Camshaft (#2264)Perfect balance of torque & high-RPM power
90mm Throttle BodyLarge 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 CalibrationWireless ECU adjustments for ultimate performance
Distributor IncludedEnsures precise ignition timing
Oil Pan, Timing Cover, & Harmonic BalancerComplete package for hassle-free installation
2-Year Unlimited Mileage WarrantyPeace 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
Ensure compatibility with your vehicle before purchasing.
Installation Notes & Recommendations
Professional Installation RecommendedRequires proper break-in procedure
Pre-Tuned for Performance & DriveabilityMinimal tuning adjustments needed
Use the Bluetooth E-Tuner App for Real-Time Adjustments
Some additional components may be required for full installation.
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.
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
The Edelbrock/Musi 555 Pro-Flo 4 XT is the most powerful package in our line and features the Pro-Flo 4 XT electronic fuel injection. The Pro-Flo 4 XT EFI system consists of 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 system also includes fuel injectors, fuel rails, throttle body, electronic engine control unit (ECU).
Like the Pro-Flo 4 single-plane application, this engine is ready to run right out of the crate with pre-loaded calibrations. 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.
- Displacement: 555 c.i.d.
- Horsepower: 723 hp
- Torque: 652 ft-lbs
- Compression: 10.0:1
- Block: Big-Block (9.8″ deck height)
- Crankshaft: Forged Steel 4.250″
- Pistons: Forged
- Camshaft: Rollin’ Thunder Hydraulic Roller #2264
- Rocker Arms: 1.7:1 Roller #77790
- EFI Systems: Pro-Flo 4 XT #35883
- Cylinder Heads: E-CNC #79555
- Distributor: Included
- Valve Covers: Cast Aluminum
- Warranty: 2-Year / Unlimited Mileage
Charts
-
Edelbrock Limited Warranty Registration Form (PDF)
-
Edelbrock Crate Engine Valve Adjustment (PDF)
Guides & Documents
-
Crate Engines Instruction Sheet (32549557)(PDF)
-
Crate Engines Guide/Document (32549557)(PDF)
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 |
Startup & Installation Checklist
- Replace timing components, water pump and plugs before initial startup where applicable.
- Refill all fluids with manufacturer-specified oil and coolant.
- Verify sensors, ECU pinouts and grounds against your chassis or hull wiring.
- Startup warranty covers heads, block and internal lubricated components for 30 days from delivery.
Full terms: 30-day startup warranty · returns
