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LS7 wet sump w/ K1 forged rotating assembly & forged pistons
LS7 wet sump w/ K1 forged rotating assembly & forged pistons
TMS CNC Ported 243/799 w/ pac 660 spring   Pin It  $1,299.00
TMS CNC Ported 243/799 w/ pac 660 spring
TMS CNC Ported 243/799 w/ pac 660 springTMS CNC Ported 243/799 w/ pac 660 spring
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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


.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



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:
This product was added to our catalog on Thursday 02 August, 2018.
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