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$11,199.00
Thompson Motorsports CNC Ported 243 heads GM blue springs .580   Pin It  $1,049.00
Thompson Motorsports CNC Ported 243 heads GM blue springs .580
Thompson Motorsports CNC Ported 243 heads GM blue springs .580Thompson Motorsports CNC Ported 243 heads GM blue springs .580Thompson Motorsports CNC Ported 243 heads GM blue springs .580
Click to enlarge

 243 casting GM cores

GM blue .580 lift springs (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.

This product was added to our catalog on Friday 15 July, 2016.
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