CYLINDER HEADS
Chevrolet Big Block 396-454 (Cont.) Dart GEN7 Iron Head Dart GEN7 Iron Cylinder Heads feature high flowing ports, efficient combustion chambers which greatly improves horsepower and torque to the metric style 8.1L big block Chevy. Sold bare and compatible with most stock valve train components. Sold individually.
Intake Runner
Comb. Chamber
Port Type Angle
Valve Angle
Intake Valve 2.190"
Exhaust Valve
Part No.
Description
DRT15400170
Bare- GEN7, 8.1L
306cc
108cc
15
1.880"
Dart Heads Pro 1 CNC Ported Aluminum Head
The first fully CNC-machined production head, available with 335cc or 355cc intake run- ners, rolled valve angles, raised exhaust ports and fast-burn combustion chambers. Assembled versions include extra long valves, 1.625" double springs, retainers, locks and seals. Sold individually.
DRT19474030
Intake Runner
Comb. Chamber
Port Type Rect Rect Rect Rect
Valve Angle 24°/15° 24°/15° 24°/15° 24°/15°
Intake Valve 2.300" 2.300" 2.300" 2.300"
Exhaust Valve
Part No.
Description Bare, CNC
DRT19474030
335cc 335cc 355cc 355cc
119cc 119cc 119cc 119cc
1.880" 1.880" 1.880" 1.880"
DRT19474136 Assembled, CNC, 1.625" Double Spring, 275 Lbs. Seat Pressure,
DRT19574030
Bare,CNC
DRT19574136 Assembled, CNC, 1.625" Double Spring, 275 Lbs. Seat Pressure
Dart Big Chief PRO1, 18° Aluminum Head Dart has applied the PRO1 design concept to the Big Chief in order to help make spread port technology more affordable for Top Sportsman, Top Dragster, Pro Mod and Pro Street racers. Excellent with alcohol and nitrous, over 7,000 RPM over 500 CID high flow- ing as cast ports combined with CNC machined chambers and bowls deliver maximum power. Sold individually.
Intake Runner
Comb. Chamber
Plug Angle
Port Type
Valve Angle
Intake Valve 2.400"
Exhaust Valve
Part No.
Description
Bare Head, Super Mod Port, 4.600" Bore
95cc - Titanium 100cc - SS
DRT18475030
424cc
Angle Rect.
18
1.900"
Dart PRO2, 380cc CNC Aluminum Head Maximum performance, bracket racing, heads up and super classes. Over 7,500 RPM, 500+ CID a great head for maximum effort comp and bracket cars. PRO2 24 degree, 380cc CNC heads have been revised with larger 2.350" intake valves and revised port design for improved air flow and a substantial horsepower increase. These heads were designed to make competitive engine building easier and less expensive. Every intake port, every exhaust runner, valve bowl and combustion chamber is 100% digitally CNC machined for the ultimate consistency. Sold individually.
Intake Runner
Comb. Chamber
Plug Angle Angle
Port Type Rect.
Valve Angle
Intake Valve 2.350" 1.880"
Exhaust Valve
Part No.
Description
DRT19674080 DRT19674030
Bare Bare
380cc 380cc
124cc 124cc
24°
1.850"
Rect
24°/15° 2.300"
2018 ENGINE BUILDER CATALOG
162
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