This is a serious, no-shortcuts 903-cubic-inch Pat Musi Racing Engine, built on proven hardware and recently freshened with zero runs since service. Originally a personal piece from Pat Musi, this engine checks every box for racers looking to step into elite-level power without waiting on a build slot.

The foundation starts with a CN billet block featuring a 12.2 deck height and 5.300-inch bore, a combination well-known for durability and repeatability in high-horsepower applications. The engine is set up with four systems, wired with an EFI Tech harness, and is being sold complete minus starter and flywheel.

Internally, the rotating assembly has just 14 runs on the crankshaft and rods, while all key wear components have been addressed during the freshen-up. A new camshaft, new timing belt, new rings, and new rod bearings have been installed, and the engine has not been fired since the refresh.

This is a well-maintained, proven combination designed to go rounds—not a project, not a core, but a ready-to-drop-in powerhouse from one of the most respected names in drag racing.

Key Highlights:

• 903 cubic inches | 5.300 bore

• CN billet block | 12.2 deck

• Former personal Pat Musi engine

• EFI Tech wiring harness

• 4 systems

• 14 runs on crank and rods

• Fresh camshaft, timing belt, rings, rod bearings

• Zero runs since freshen-up

• Complete minus starter and flywheel