CAST ALUMINUM CYLINDER HEADS

Head parts kit - see page 107.

Material: RMR Cast Aluminum Alloy

Angle: 15° (stock)

PRO1 LS 15° 225cc - ALUMINUM - LS1 (CATHEDRAL PORT) - 4 BOLT CASTING - 2.050"/1.600" VALVES

1.600”

FLOW

PRO1 LS 15° 225cc - ALUMINUM - LS1 (CATHEDRAL PORT) - 6 BOLT CASTING - 2.050"/1.600" VALVES

15° 250cc LS - CNC

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Recommended for engines with 4.000” bore or larger. Maximum competition, competition modified drag racing, circle track. Over 7,000 RPM.

Dart’s PRO1 LS 15° 250cc CNC ported Aluminum cathedral port cylinder heads for GM LS series small block V8 engines take performance to the next level.

This LS CNC cathedral port head is machined on a dedicated casting with extra thick sections to maintain the proper wall thickness after porting. Due to the large diameter intake valves, the Dart LS CNC head is recommended for use on engines with 4.000 inch and larger cylinder bores. Precise computer-controlled CNC machining, multi-angle intake seats, and radiused exhaust seats enhance airflow. Extra material above the ports accommodates valve train upgrades.

Heads are sold individually.

Head parts kit - see page 107.

GEN III - CATHEDRAL PORT CAST ALUMINUM CYLINDER HEADS

PRO1 LS 15° 250CC CNC - ALUMINUM - LS1 (CATHEDRAL PORT) - 4 BOLT CASTING2.080"/1.600" VALVES

PRO1 LS 15 ° 250cc CNC SPECS

Material: RMR Cast Aluminum Alloy

Valve Angle: 15° (stock)

Intake Port Volume: 250cc CNC

Intake Valve: 2.080”

Exhaust Valve: 1.600”

Chamber Volume: 68cc

PRO1 LS 15° 250cc CNC - ALUMINUM - LS1 (CATHEDRAL PORT) - 6 BOLT CASTING2.080"/1.600" VALVES

FLOW DATA @ 28” WATER

GEN III - RECTANGLE PORT CAST ALUMINUM CYLINDER HEADS 15° 280cc LS

Recommended for engines with 4.000” bore or larger. Maximum competition, comp/modified drag racing, circle track, and heavy duty applications.

Dart’s LS based PRO1 LS 15° 280cc Aluminum rectangle port cylinder head (LS3 compatible) for GM LS series small block V8 engines take performance to the next level. Offers higher performance and more versatility than factory designs.

The 15° based high performance cylinder head has better airflow, more efficient combustion chambers and more user-friendly features than production LS castings. The Dart PRO1 280cc cylinder head retains stock valve angles, stock valve locations and stock accessory mounting holes to make installation easy. Virtually everything else has been improved.

Heads are sold individually.

UPGRADE SMC (SUPER MOD COMPLETE)