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Race-proven features and affordable pricing make these Dart Pro 1 355-T6 aluminum cylinder heads one of the biggest values in racing. They come available as bare castings or fully assembled. The fully assembled heads include stainless steel valves, valve springs, retainers, locks, seals, studs, and guideplates. They come with your choice of angled or straight plug locations and accept all early and late model accessory brackets.

Cylinder Head Style: Assembled

Cylinder Head Material: Aluminum

Cylinder Head Finish: Natural

Combustion Chamber Volume (cc): 121

CNC-Machined Combustion Chamber: Yes

Intake Runner Volume (cc): 355cc

Exhaust Runner Volume (cc): 138cc

CNC-Machined Intake Runner: Yes

CNC-Machined Exhaust Runner: Yes

Combustion Chamber Style: Heart

Intake Port Shape: Rectangular

Intake Port Location: Standard

Exhaust Port Shape: Round

Exhaust Port Location: Raised

Intake Valves Included: Yes

Intake Valve Diameter (in): 2.300 in.

Exhaust Valves Included: Yes

Exhaust Valve Diameter (in): 1.880 in.

Valve Springs Included: Yes

Maximum Valve Lift (in): 0.850 in.

Outside Diameter of Outer Spring (in): 1.625 in.

Damper Spring Included: No

Number of Springs Per Valve: Dual

Retainers Included: Yes

Retainer Material: Titanium

Locks Included: Yes

Lock Style: 10 degree

Valve Stem Seals Included: Yes

Valve Stem Seal Style: Positive stop

Rocker Arm Studs Included: Yes

Rocker Arm Nut Thread Size: 7/16-20 in.

Rocker Arms Included: No

Rocker Arm Nuts Included: No

Guideplates Included: Yes

Guideplate Pushrod Size: 3/8 in.

Valve Cover Mounting Style: Perimeter bolt

Accessory Bolt Holes Drilled: Yes

Intake Valve Angle: 24

Exhaust Valve Angle: 15

Valve Guides Included: Yes

Valve Guide Material: Manganese bronze

Valve Seats Machined: Yes

Valve Seat Machine Style: 4-angle intake/3-angle exhaust

Valve Seat Material: Ductile iron

Steam Holes Drilled: No

Oiling Style: Through pushrod

Machined for O-Ring: No

Heat Crossover: No

Quantity: Sold individually.

Notes: Exhaust flange will accept stock-type gasket. Designed for hydraulic roller or flat tappet camshafts.