Recommended for engines with 4.125” bore or larger.  Maximum competition, comp/modified drag racing, circle track, and heavy duty applications.

Dart’s new PRO1 LS 12° 285cc CNC Aluminum rectangle port cylinder head for GM LS7 Compatible small block V8 engines take performance to the next level. This full CNC ported cylinder head offers higher performance and more versatility than factory designs.

The 12° based high performance cylinder head has better airflow, more efficient combustion chambers and more user friendly features than production LS castings. The Dart PRO1 285cc cylinder head retains stock valve angles, stock valve locations and stock valve train mounting with dowel holes to make installation easy and durable.

Dart Rocker bar included (61400011)

Heads are sold individually.