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. 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 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. ❓ 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