Dart 19300136 Pro 1 Cylinder Head for Big Block Chevy, 345cc

Dart's Pro 1 cylinder heads for big block Chevrolet engines are ideal for street performance enthusiasts and weekend racers alike. These heads are powerful, lightweight and come fully assembled with valves and springs. Specifications: 345cc intake ports, 121cc combustion chamber, 1.625 double springs, 2.30/1.88 valves. -345cc cylinder heads are optimal for engines with 540+ cubic in displacement reaching around 7,000+ max rpm. -The 1.625 double spring is intended primarily for engine applications using a mechanical cam. -Use on GM generation V and VI (1990 - 2000) motors requires head gaskets equivalent to Fel-Pro # 1047 (for 4.54" bore) or Fel-Pro # 1037 (for 4.37" bore). - Cylinder heads sold individually, set required for engine use.

• Made start to finish in the U.S.A.
• Works with virtually all factory standard parts.
• Proven technology tested for the race track and for the street.
• Cast from premium C355-T61 aircraft aluminum.
• Developed to produce maximum horsepower and efficiency.