Indy Cylinder Heads Stock Intake Port
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The intake port on the left is stock. The SR comes bowl-blended where the hardened-steel valve seat meets the aluminum. The intake port on the right was fully bowl-blended, polished, and the valveguide boss trimmed. Not seen is the short turn of the port floor that was polished with 100- then 220-grit sanding rolls. View Related Article
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