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501 Series Performance Heads 40 by 35.5 Valves, Pair Journal Type 4 914 and have a 33mm CompressionHeight The first 100 bolt and have a 33mm CompressionHeight Type 2 1970 1971 so you can Fly cut your heads deeper to achieve almost any desired Head CC volume needed Blocked off rocker stud bosses

Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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