50 YEARS OF POWER

Pat Musi Racing Engines has been providing unparalleled power and performance for the track and the street since 1970.

WHY CHOOSE MUSI?

ONLY THE BEST COMPONENTS FROM TOP MANUFACTURERS

Based in Mooresville, North Carolina, Pat Musi Racing Engines is a one-stop shop for sportsman engines with a Pro Mod pedigree. Pat Musi Racing Engines controls every component of the engine, from in-house manifolds to custom cylinder heads.

Pat Musi has been at the forefront of electronic fuel injection (EFI) technology for over two decades, and that experience is available to every customer with custom-designed EFI systems, exclusive software and individualized tuning. Whether going rounds in Super Comp or setting records in Pro Nitrous, each customer receives the same quality and workmanship Pat Musi Racing Engines is known for worldwide.

Our Engines

EDELBROCK / MUSI 555 CRATE ENGINE

Configurations

555 Crate engines are ready to run with three configurations including AVS2 carbureted, Pro-Flo 4 EFI, and Pro-Flo 4 XT EFI to suit your personal preference.

Musi Built

Each 555 Crate Engine is hand-built by 8-time Pro Street World Champion Pat Musi, a legendary engine builder with a reputation for making big horsepower!

Big Power

Looks aside, these 555 crate engines make big power! This engine with Pro-Flo 4 XT EFI makes a neck-snapping 723 HP and 652 TQ on pump gas.

EDELBROCK / MUSI 555 CARBURETED

Born from the Edelbrock-Musi crate engine partnership, the 555 Crate Engine is assembled by the master engine builder himself, Pat Musi, using nothing but the best Edelbrock components including CNC-ported aluminum cylinder heads, Victor Jr. intake manifold, forged 10.0:1 pistons, forged steel crank, AVS2 Series 800 CFM carburetor, Rollin’ Thunder hydraulic roller cam and valvetrain, and Max-Fire ignition system. 

Features Include:

^

AVS2 Carbureted

^

676 horsepower with 649 ft-lbs of torque

^

Tuned to run on 91-octane pump gas

^

Competition ready yet ultra-reliable for daily street use

EDELBROCK / MUSI 555 PRO-FLO 4 EFI

The Edelbrock/Musi 555 RPM Pro-Flo 4 performance crate engine is complete with Pro-Flo 4 electronic fuel injection and is assembled with intake manifold, fuel injectors, fuel rails and throttle body, electronic engine control unit (ECU), handheld calibration module, high quality billet distributor, complete harness, O2 sensor & bung, fuel hose, hardware and software. This engine can be fine-tuned with the handheld calibration module without the need for a laptop.

Features Include:

^

Pro-Flo 4 Fuel Injection

^

697 horsepower with 643 ft-lbs of torque

^

Tuned to run on 91-octane pump gas

^

Competition ready yet ultra-reliable for daily street use

EDELBROCK / MUSI 555 PRO-FLO 4 XT EFI

The Edelbrock/Musi 555 Pro-Flo XT is the most powerful crate engine package in our line and features our powerful Pro-Flo XT electronic fuel injection. The Pro-Flo XT EFI system consists of a skillfully engineered intake manifold with a unique design that delivers more horsepower and torque than a traditional single-plane intake manifold. The system also includes fuel injectors, fuel rails, O2 sensor & bung, throttle body, electronic engine control unit (ECU) and handheld calibration module. This engine can be fine-tuned with the handheld calibration module without the need for a laptop.

Features Include:

^

Pro-Flo 4 XT Fuel Injection

^

723 horsepower with 652 ft-lbs of torque

^

Tuned to run on 91-octane pump gas

^

Most powerful 555 crate engine package

EDELBROCK / MUSI 632

MUSI 959 EFI PRO NITROUS

MEET THE BUILDER

PAT MUSI

Pat Musi’s reputation for winning began in ’71 on the streets of Queens, New York, at the wheel of a souped-up ’55 Chevy.

He wisely transitioned from the streets to more legal forms of drag racing and following brief stints in the bracket and Modified ranks, Pat Musi rose to prominence as one of the fiercest competitors in Pro Stock and a true champion with 8 PDRA Pro Street World Championships.

Today, Pat brings that experience of driving a race car into the engine-building room at Pat Musi Racing Engines where many of the top Pro Mod racers go for their race-winning engines. As he has since 2004, Pat works exclusively with us to share his expertise in the Edelbrock-Musi Crate Engine Program that was created specifically for drag racers looking for big horsepower with unmatched durability. The street segment of this partnership includes the Edelbrock-Musi 555 Crate Engine, a complete ready-to-run power plant that makes an incredible 723 horsepower and 652 ft-lbs of torque on pump gas.

HOMETOWN:

Carteret, NJ

RACING EXPERIENCE:

8-time Pro Street World Champion, 4-Time PDRA Nitrous Wars Engine Building Champion, NHRA Pro Modified Event Winner, IHRA Pro Modified Event Winner, IHRA Pro Stock Event Winner, NHRA Pro Stock competitor

CAREER BEST ET / SPEED (1/8 mile):

3.615 seconds / 209.23 MPH

Send Us A Message

Visit Us

Address

379-B Timber Rd
Mooresville, NC 28115

©2020 Musi Enterprises

Design By