Holley

300-556

Holley 300-556 Cylinder Heads

EAN: 0090127538241

UPC: 090127538241

Engine Parts

Valve angle is 24.5-degrees, intake runner volume of 274cc and a combustion chamber volume of 110cc for top performance
Intake valve diameter is 2.19" and the exhaust valve diameter is 1.88"
90-day limited warranty

The Holley heads are designed to work on Gen IV, Gen V and Gen VI Chevy big block engines. The cylinder heads features a stock exhaust location and ARP rocker studs. It has a maximum life of .70"

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