05 535 Inch Bracket Big Block Monster Indy Cylinder Heads
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04 The 440-1 Indy heads utilize 2.25-inch intake and 1.81-inch exhaust valves, and we checked the chamber volume and found it to be 75.4 cc's. Testing the valve springs, they checked out at 295 pounds of seat pressure and 745 pounds of open pressure. View Related Article
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