Dart PRO1 15° 225cc Cylinder Head (ASSEMBLED) Part #11021122

Dart

Price: $1,274.08
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11021122
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PRO1 15° 225cc intake runner covers applications from street cars and trucks to racing. As cast ports flow more than many ported designs at a much more affordable price.

Dart’s 15° 225cc Aluminum cathedral port cylinder head for GM LS series small block V8 engines offers higher performance and more versatility than factory designs.

The Dart LS high performance cylinder head has better airflow, more efficient combustion chambers, and more user friendly features than production LS castings.

The Dart LS style 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.

 

Part# 11010010 - 11021122

Material: 355T6 alum alloy

Comb Chambers: 62cc

Intake Valve Dia: 2.02” & 2.05”

Intake Port volume: 205cc & 225cc

Intake Port Dim: 1.020”w x 3.170” -205cc / 1.030”w x 3.230” – 225cc

Int Port Location: Stock

Intake Gasket: MS 92438 or GM #89017465

Exh Valve Dia.: 1.600”

Exh Port volume: 85cc

Exhaust Port Dim: 1.650”w x 1.400”

Exh Port Location: Stock location & bolt pattern

Exhaust Gasket: Fel-Pro# 1438

Flow, Intake: 290cfm @ .500” lift / 28”

Flow, Exhaust: 205cfm @ .500” lift / 28”

Head Bolts: ARP 134-3609 / Stock TTY

Head Studs: ARP 134-3610

Manifold: Stock / Stock type / LS6

Milling: (.0055” = 1cc) Flat Mill

Pistons: Stock style

Push Rod length: Stock (7.400”)

Push rod Guide Plate: N/A

Retainers: Titanium ( 7°)

Spark Plug: Autolite 3934 / NGK FR5, BKR6E

Spring Pockets: 1.350” OD

Springs: 1.290” Beehive - PSI

Valve Length: 4.900” Intake / 4.940” Exhaust

Valve Stem Dia: 8mm

Valve Train: Stock

Valve Guides: .439” OD Mag-bronze

Valve Guide length: 2.100”

Valve Guide clearance: .0013” Intk / .0015” Exhst

Valve Guide Spacing: Stock

Valve Seats: Powder metal, .006” press

Valve Seat dim. Int - 2.160” x .350” Exh - 1.650” x .350”

Valve Seat angles: Int = 32° - 45° - 60° - 70° - 90° Exh = 37° - 45° - radius

Torque: OE / 11mm ARP bolts 70 ft.lbs. 8mm 23ft.lbs

All warranty questions, claims or otherwise should be directed toward the manufacturer, Dart Machinery.

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