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Thompson Motorsports CNC Ported 243/799 w/ pac 660 spring kit
243/799 casting GM cores
PAC 660 spring kit with Titanium retainers, chromoly locators, Viton high lift seals
GM Valves remanufactured valves (stainless steel valve upgrade available for $239.99)
CNC port intake runners
CNC port exhaust runners
Surface heads
Face intake surface and exhaust surface
True valve cover rail
Performance 5 angle valve job
Logo heads
Assemble heads
| CNC STAGE 1 |
INTAKE 235CC |
EXHAUST 95CC |
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| STOCK VALVES |
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| INTAKE |
CFM |
EXHAUST |
CFM |
| .100" |
78 |
.100" |
57 |
| .200" |
138 |
.200" |
106 |
| .300" |
204 |
.300" |
140 |
| .400" |
259 |
.400" |
166 |
| .500" |
288 |
.500" |
185 |
| .600" |
306 |
.600" |
194 |
| .650" |
310 |
.650" |
197 |
| .700" |
313 |
.700" |
200 |
These heads have a 235CC intake runner and 95CC exhaust runner.
Have questions? Give us a call 972-853-2450 OR come by the office and see them at
545 Justin Place
Nevada, TX
75173
These heads are performance heads, It is the purchasers responsibility to ensure that the product purchased will work with your build. We are not responsible for incorrectly ordered or installed parts.
***dealer and wholesale accounts available, call for details***
**please call for rush orders**
We make every effort to keep these motors/heads in stock, however build times can vary. So please call to verify the build time of your motor/heads.
| Available Options: |
| valve upgrade: |
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