head gaskets bolts

BIG-BLOCK CYLINDER HEAD GASKETS

Secure sealing between the cylinder heads and the block is a critical component of making reliable horsepower, so Chevrolet Performance puts the same engineering excellence and manufacturing precision into their gaskets, head bolts, and cylinder head studs as the blocks and heads they secure. Big-Block cylinder head gaskets are available in a variety of materials and thicknesses. Piston-to-head clearances should be considered when selecting gaskets. Use Gen V for 1991-1992 applications. Gasket packages contain one gasket unless otherwise specified.


12363414

COMPOSITION HEAD GASKET, 1965-1990

  • With pre-flattened copper wire ring and permatorque/blue stripe coating for engines with aluminum heads
  • Bore sizes between 4.250" and 4.370"
  • Use with Mark IV (1965-1990) engines only
  • Compressed thickness is 0.039"

12363412

COMPOSITION HEAD GASKET, 1991-NEWER

  • For 1991 and newer Gen-V and Gen-VI Big-Blocks with aluminum heads and 4.250" to 4.370" bore size
  • Has pre-flattened wire ring and stainless core that makes it ideal for saltwater marine use
  • Compressed thickness is 0.039"

12555728

HEAD GASKET, 454 ENGINE

  • Head gasket for 1991–2000 Gen-V 454 Big-Blocks

12366984

HEAD GASKET KIT, 502 ENGINE

  • For all Gen-V and Gen-VI 502 Big-Blocks with cast-iron heads
  • Has additional water hole for improved cooling of siamesed cylinder walls
  • Includes 2 gaskets (right and left) per package
  • Compressed thickness is 0.041"

12363411

COMPOSITION HEAD GASKET, 1991-NEWER

  • For Gen-V and Gen-VI Big-Blocks with aluminum heads and 4.375" to 4.540" bore size
  • Has pre-flattened wire ring and stainless core that makes it ideal for saltwater marine use
  • Compressed thickness is 0.039"

88961561

HEAD GASKET, 572 ENGINE

  • With pre-flattened wire ring for all 572 Big-Blocks with either cast-iron or aluminum heads
  • Compressed thickness is 0.030"

BIG-BLOCK HEAD BOLTS AND STUDS

12367779

CYLINDER HEAD BOLT KIT

  • Universal kit for cast-iron and aluminum Big-Block heads
  • Includes (8) 7/16-14 x 2.08" bolts P/N 88960334, (24) 7/16-14 x 4.060" bolts P/N 88960333, (8) 7/16-14 x 5.06" bolts P/N 88960332, and (40) hardened washers P/N 14011040
  • Use part numbers above for replacement parts
  • Use thread sealant on all Big-Blocks except 502, due to blind bolt holes

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