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About Straightline Performance Billet Head and Insert

Straightline Performance Billet Head and Insert

  • 4-5 HP increase on all heads and insert combinations
  • Provides three times the cooling
  • Increased combustion chamber burn rate, and increased mph
  • Features black anodized finish for lifetime corrosion protection
  • Billet heads require no jetting changes
  • All inserts and O-rings included in kits.

Warning:  California Proposition 65

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