CHEVY LS- SERIES ALUMINUM CYLINDER HEADS
Our line of LS-series cylinder heads is rapidly expanding. The LS( Gen3 / 4) platform has many design benefits over the earlier SBC engine designs, most notably the cylinder heads. Although the GM heads are good pieces, We have developed a superior line of heads for modern performance enthusiasts. Like all Speedmaster cylinder heads, the LS-series heads are produced using our“ Gravity Casting” process. This process ensures a more uniform and robust casting, laying a strong platform to build on. Take a look below at our offerings, surely you will find a head to suit your application. If you require any additional information, or help selecting the correct cylinder head for your application, please feel free to call one our techs.
LS1 / LS2 / LS6 / 5.3 / 5.7 HEADS
Finished PN #’ s
SM3016 SM3017-64 SM3017-64VJ
BL10164 BL10164VJ BL10168 BL10168VJ
LS3 / L92 HEADS
Finished PN #’ s
SM3018 SM3019-68 SM3019-68VJ SM3019-68XLVJ SM3019-71 SM3019-71VJ SM3019-71XLVJ
LS7 HEADS
Finished PN #’ s
Valve Angle
15 15 15
15 15 15 15
Valve Angle
15 15 15 15 15 15 15
Valve Angle
Valve Sizes
2.02”/ 1.55” 210cc. 2.02”/ 1.55” 225cc. 2.055”/ 1.60” 225cc.
2.055 / 1.6 2.055 / 1.60 2.08 / 1.6 2.08 / 1.6
Valve Sizes
2.165”/ 1.59” 250cc. 2.165”/ 1.59” 270cc. 2.165”/ 1.60” 270cc. 2.200”/ 1.60” 270cc. 2.165”/ 1.59” 270cc. 2.165”/ 1.60” 270cc. 2.200”/ 1.60” 270cc.
Valve Sizes
Int. Vol.
198cc. 198cc. 198cc. 198cc.
Int. Vol.
Int. Vol.
Chamber Volume
62cc. 64cc. 64cc.
64cc. 64cc. 68cc. 68cc.
Chamber Volume
64cc. 68cc. 68cc. 68cc. 71cc. 71cc. 71cc.
Chamber Volume
Comp. valvejob
No No Yes
No Yes No Yes
Comp. valvejob
No No Yes Yes No Yes Yes
Comp. valvejob
Port Finish
As Cast CNC CNC
CNC CNC CNC CNC
Port Finish
As Cast CNC CNC CNC CNC CNC CNC
Port Finish
Chamber Finish
As Cast CNC CNC
CNC CNC CNC CNC
Chamber Finish
As Cast CNC CNC CNC CNC CNC CNC
Chamber Finish
Flow Results Speedmaster # SM3017-64VJ These Flow Numbers are with a Performance Valvejob Intake Valve- 2.020” Exhaust Valve- 1.600”
LIFT INTAKE EXHAUST
0.100 |
67.9 |
54.0 |
0.200 |
139.0 |
113.0 |
0.300 |
201.1 |
157.6 |
0.400 |
255.7 |
183.2 |
0.500 |
286.1 |
197.6 |
0.600 |
291.5 |
203.3 |
0.650 |
293.3 |
206.6 |
Intake Port: 215cc Exhaust Port: 90cc Combustion Chamber: 64cc
Flow Results Spedmaster # SM3019-68XLVJ These Flow Numbers are with a Performance Valvejob Intake Valve- 2.200” Exhaust Valve- 1.600”
LIFT INTAKE EXHAUST
0.100 |
71.5 |
59.1 |
0.200 |
158.7 |
123.2 |
0.300 |
229.8 |
174.1 |
0.400 |
290.6 |
218.4 |
0.500 |
327.3 |
240.4 |
0.600 |
359.5 |
252.5 |
0.700 |
377.4 |
260.6 |
Intake Port: 270cc Exhaust Port: 84cc Combustion Chamber: 68cc
BL10264 BL10264VJ BL10267 BL10267VJ |
15 15 15 15 |
2.20 / 1.6 256cc. 2.20 / 1.60 256cc. 2.20 / 1.6 256cc. 2.20 / 1.6 256cc. |
64cc. 64cc. 68cc. 68cc. |
No Yes No Yes |
CNC CNC CNC CNC |
CNC CNC CNC CNC |
86 |
|
|
|
|
|
|