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Head Rule Addendum
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| 2011 Rule Addendum 12/13/2011 The Racing Head Service “Pro Torker 23” part number 12400 Cast Iron Cylinder head will also be allowed on the Fuel Injector Engine Package only. The rule will now read as followed: 2.1.4 Spec Comp World Product Head # 43600 or Racing Head Service #12400 |