Page 210 - 2021-22_EngineCatalogAP

CYLINDER HEADS
Dart PRO2, 380cc CNC Aluminum Heads
Maximum performance for 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°,
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 con- sistency. Sold individually.
Edelbrock Performer RPM
High-Compression 454-O Aluminum Head
Oval port head has exhaust crossover passage to achieve 50 state legal status. Sold individually.
Edelbrock E-Street Aluminum Head
These E-Street Aluminum cylinder heads are designed for entry-level street perfor-
mance engines operating in the idle to 5,500 rpm range. Features Edelbrock A356
T-6 aluminum alloy for superior strength, larger-than-stock intake and exhaust ports,
modern combustion chamber design, heli-coiled threaded inserts, manganese bronze
valve guides, 7/16" ARP rocker studs, and powder metal interlocking valve seats.
Assembled heads include stainless steel one-piece valves, hardened spring cups, 7/16" ARP rocker arm studs, 3/8" guide plates, 1.550" dia. valve springs, steel reatiners, and PC-seals. Max valve lift .700". Sold individually.
Edelbrock Performer High Compression,
Performer RPM & Performer RPM
High-Compression Aluminum Heads
Performer RPM head is available with oval or rectangular ports. Performer RPM
454-O heads are the same as Performer castings, but the exhaust crossover has
been deleted. The 454-R rectangular port head flows substantially more than the oval port head in the 3500-7000 RPM range. All sold individually. Bare or assembled.
Part No.
Description
Intake Runner
Comb. Chamber
Plug Angle
Port Type
Valve Angle
Intake Valve
Exhaust Valve
DRT19674080
Pro 2 Bare Head
380cc
124cc
Angle
Rect.
24°
2.350"
1.850"
DRT19674030
Pro 2 Bare Head
380cc
124cc
Straight
Rect.
24°/15°
2.300"
1.880"
Part No.
Description
Intake Runner
Comb. Chamber
Port Type
Valve Angle
Intake Valve
Exhaust Valve
EDE60439
Assembled,
1.55" Dual Valve Springs, Hyd. Cam
290cc
100cc
Oval
26°
2.190"
1.880"
Part No.
Description
Intake Runner
Comb. Chamber
Port Type
Valve Angle
Intake Valve
Exhaust Valve
EDE50459
Assembled
290cc
110cc
Oval
26°
2.190"
1.880"
Part No.
Description
Camshaft
Intake Runner
Comb. Chamber
Port Type
Valve Angle
Intake Valve
Exhaust Valve
EDE60435 A
Assembled, H/C Performer RPM
Hydraulic Roller
290cc
100cc
Oval
26°
2.190"
1.880"
EDE60439 A
Assembled, H/C Performer RPM
Flat Tappet
290cc
100cc
Oval
26°
2.190"
1.880"
EDE60455
Assembled, Performer RPM
Hydraulic Roller
290cc
110cc
Oval
26°
2.190"
1.880"
EDE60459
Assembled, Performer RPM
Flat Tappet
290cc
110cc
Oval
26°
2.190"
1.880"
EDE60499 B
Assembled, H/C Performer
Flat Tappet
290cc
100cc
Oval
26°
2.190"
1.880"
EDE60549
Bare Head, Performer RPM
Flat Tappet
315cc
118cc
Rect.
26°
2.190"
1.880"
EDE60559
Assembled, Performer RPM
Flat Tappet
315cc
118cc
Rect.
26°
2.190"
1.880"
EDE61559
Assembled, Marine Performer RPM
Flat Tappet
315cc
118cc
Rect.
26°
2.250”
1.890”
A High-Compression Performer RPM. B High-Compression Performer
208 2021-22 ENGINE BUILDER CATALOG
CHEVROLET BIG BLOCK