CHEVY
SMALL-BLOCK V8 |
CYLINDER
HEADS |
|
|
Part Number |
Description |
Casting Number |
Material |
Intake Runner Volume (cc) |
Combustion Chamber
Volume (cc)
|
Valve Diameter |
Spark Plugs |
Heat Risers |
Notes |
|
10125377 |
Cyl. Head w/valves |
14101083 |
Iron |
—
|
64 |
I:
1.94"
E: 1.50" |
Straight |
Yes |
350 285 HP service head w/valves & springs. |
|
10159552 |
Cyl. Head
Bare
|
14011083 14096217 |
Iron |
—
|
6 4 |
I:
1.94"
E: 1.50" |
Straight |
Yes |
350 /300 HP |
|
12480092 |
Service replacement |
3991492 |
Cast iron |
157 |
64 |
I:
2.02"
E: 1.60" |
Straight |
Yes |
pushrod guideplates. |
|
12558060 |
L31 Service w/valves |
10239906 or12558062 |
Cast Iron |
170 |
64 |
I:
1.94"
E: 1.50" |
Straight |
No |
Vortec Design Port w/valves & springs. |
|
12529093 |
L31 Service No valves |
10239906 or12558062 |
Cast Iron |
170 |
6 4 |
I:
1.94"
E: 1.50" |
Straight |
No |
Vortec Design Port less valves |
|
88958692 |
Bow Tie |
3991492 |
Cast Iron |
157 |
6 4 |
I:
2.02"
E: 1.60" |
Straight |
Yes |
For leaded Fuel No Valves |
|
12480053 |
Bow Tie Phase II |
14011034 |
Cast iron |
184 |
64 |
I:
2.02"
E: 1.60" |
Angled |
No |
Off-highway cast iron head. |
|
12480034 |
Bow Tie Phase III |
12480034 |
Cast iron |
184 |
64 |
I:
2.02"
E: 1.60" |
Angled |
No |
Off-highway cast iron head. |
25534351 |
Vortec
Bowtie |
25534351C |
Cast
iron |
175 |
65 |
I:
2.00"
E: 1.55 |
Straight |
No |
Vortec
design
small port bare. |
25534321 |
Vortec
Bowtie |
25534351C |
Cast
iron |
175 |
65 |
I:
2.00"
E: 1.55 |
Straight |
No |
Vortec
design
small port w/valves |
25534371 |
Vortec
Bowtie |
25534371C |
Cast
iron |
206 |
65 |
I:
2.00"
E: 1.55 |
Straight |
No |
Vortec
design
large port bare |
25534431 |
Vortec
Bowtie |
25534371C |
Cast
iron |
206 |
65 |
I:
2.00"
E: 1.55 |
Straight |
No |
Vortec
design
large port w/valves |
|
12556463 |
Corvette Design for 350 HO service engine |
10088113 |
Aluminum |
163 |
58 |
I:
1.94"
E: 1.50" |
Angled |
No |
Assembly with springs, valves, studs, and no guideplates.
|
|
12363287 |
LT4 service only |
12555690 |
Aluminum |
195 |
54.4 |
I:
2.00"
E : 1.55" |
Angled |
No |
For LT1 or LT4 usage only |
|
12497186 |
Fast Burn No valves |
12367713 |
Aluminum |
210 |
62 |
I:
2.00"
E: 1.55 |
Angled |
No |
Fast Burn. No valves. |
|
12464298 |
Fast Burn w/valves |
12367713 |
Aluminum |
210 |
62 |
I:
2.00"
E: 1.55" |
Angled |
No |
Fast Burn w/valves & springs. Vortec design. |
|
24502569 |
CNC Machined |
10134363 |
Aluminum |
258 |
65 |
I:
2.150" E: 1.620" |
Angled |
No |
18° valve angle; for 9.1 compression |
|
24502580 |
Bow Tie High-Port |
10134363 |
Aluminum |
215 |
60 |
N/A
|
Angled |
No |
18°valve angle; no seats, guides; for 9.1 engines.
|
|
12370855 |
Bow Tie High Port |
10134363 |
Aluminum |
215 |
60 |
N/A
|
Angled |
No |
18°valve angle; no seats, guides; for 9.1 engines
x-ray head. Hipped. |
|
24502582
Discontinued
For Reference Only |
Bow-Tie CNC High Port |
10134363 |
Aluminum |
245 |
65 |
I:
2.150" E: 1.620" |
Angled |
No |
18° CNC Ported for 9.1 Engines |
|
24502615 |
Bow-Tie |
10134363 |
Aluminum |
210 |
35 to 37 |
N/A
|
Angled |
No |
15° valve angle; no seats,guides. |
|
24502517 |
Splayed Valve |
10185040 |
Aluminum |
240 |
45 |
N/A
|
Angled |
No |
Splayed Valve design |
|
12480146 |
Splayed Valve |
10185040 |
Aluminum |
240
|
45 |
N/A
|
Angled |
No |
Semi-Machined |
|
12480147 |
Splayed Valve |
10185040 |
Aluminum |
240 |
45 |
N/A
|
Angled |
No |
Semi-Machined |
|
12480011 |
SB2.2 |
12480011 |
Aluminum |
284 |
48 |
- |
Angled |
No |
8° Exhaust |
|
12480021 |
SB2.2 CNC Ported |
12480011 |
Aluminum |
287 |
54 |
I:
2.150" E: 1.625" |
Angled |
No |
CNC w/seat & guides |
