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LT4 forged piston and rod stock crankshaft
LT4 forged piston and rod stock crankshaft
$5,645.00
Thompson Motorsports CNC Ported 317w/ pac 1218 spring   Pin It  $1,099.00
Thompson Motorsports CNC Ported 317w/ pac 1218 spring
Click to enlarge

Thompson Motorsports CNC Ported 317 w/ pac 1218 springs

317 casting GM cores

PAC 1218 (many other springs available)

GM Valves remanufactured valves (stainless steel 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

 

317 CNC STAGE 1 INTAKE 235CC EXHAUST 95CC  
STOCK VALVES      
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:
This product was added to our catalog on Thursday 02 August, 2018.
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