Page 213 of GM Performance Parts 2006 Catalog by GM Parts Direct

NOTE: CYLINDER HEAD GASKETS HEAD BOLTS GM Performance Parts cylinder head gaskets, cylinder head bolts, and cylinder head studs are the finest quality parts available to insure a secure seal between the engine block and cylinder heads. Gasket packages contain one gasket unless otherwise specified. Order two per engine. Big-block cylinder head gaskets are available in a variety of materials and thicknesses. Keep engines intended usage and minimum piston-to-head clearance in mind when selecting gaskets. Use Gen V for 1991-1992 applications. B. 14015351 Steel Shim Head Gasket (1965-1990) Beaded steel gasket for 1965-1990 cast iron heads and bigblocks with 4.250" cylinder bores. Install with head gasket sealer or aluminum paint. Use with Mark IV (1965-1990) engines only. Compression thickness is .022". C. 12363414 Composition Head Gasket (1965-1990) Composition head gasket with pre-flattened copper wire ring with permatorque/blue stripe coating for engines with aluminum heads and bore sizes between 4.250" and 4.370". Compressed thickness is 0.039". Use with Mark IV (1965-1990) engines only. 10159507 Composition Head Gasket (1965-1990) Composition head gasket for Mark IV 1965-1990 big-blocks with 4.440" cylinder bores. Compressed thickness is 0.039". No sealer required. Re-torque after engine is first run. Use with Mark IV (1965-1990) engines only. 12363413 Composition Head Gasket (1965-1990) Composition head gasket with pre-flattened copper wire ring with permatorque/blue stripe coating for engines with aluminum heads and bore sizes 4.375" to 4.540". Compressed thickness is 0.041". Use with Mark IV (1965-1990) engines only. 211 BIG BLOCK HEADS Part Casting Port Port Valve Chbr Int Exh Exh Plug Heat Rocker Number Description Number Mat'l Size Type Angle CC's Vlv Vlv Port Type Riser Stud Notes 12562920 Gen 5,6 BBC 12562934 Iron 325 Rect BBC 118 2.18 1.88 Square Std Y Screw-in Ass'd 2925's 12562925 Gen 5,6 BBC 12562934 Iron 325 Rect BBC 118 2.18 1.88 Square Std Y Screw-in 7/16 accy holes 12562926 Gen 5,6 BBC 12562934 Iron 325 Rect BBC 118 2.18 1.88 Square Std Y Screw-in 3/8 accy holes 12552888 Gen 5,6 BBC 10114156 Iron - Round BBC 118 2.07 1.72 Square Std Y Screw-in HT 502 head 12363390 Oval Alum 12363391 Alum 290 Oval BBC 110 2.25 1.88 Square Std N Screw-in Semi-open, oval port 12363392 Oval Alum 12363391 Alum 290 Oval BBC 110 2.19 1.88 Square Std N Screw-in Semi-open, oval port 12363399 Oval Alum 12363391 Alum 290 Oval BBC 110 2.19 1.88 Square Std N Screw-in Bare 3392 12363408 NHRA L88 12363401 Alum 315 Rect BBC 118 2.19 1.88 Square Std N Screw-in Bare, NHRA legal 12363400 Rect Alum 12363401 Alum 315 Rect BBC 118 2.25 1.88 Square Std N Screw-in 12363410 Rect Alum 12363401 Alum 315 Rect BBC 118 2.25 1.88 Square Std N Screw-in Bare 3400 12363425 BBC Bowtie 14044861 Alum 380 Rect BBC 115 2.19 1.88 Square Std N Screw-in Bare, raised int/exh 14044876 BBC Bowtie 14044861 Alum 380 Rect BBC 115 2.19 1.88 Square Std N Screw-in Unmach 12363425 12499255 572/620 Alum 380 Rect BBC 118 2.25 1.88 Square Std N Screw-in ZZ572/620 88961160 572/720 Alum 380 Rect BBC 118 2.25 1.88 Square Std N Screw-in ZZ572/720R 10051128 Prostock BBC Alum 400 Special 72 Square N Shaft No seats/guides 10051129 Prostock BBC Alum 400 Special 72 Square N Shaft Unmachined 1128 22530959 DRCE 1 Alum DRCE 1 DRCE N Shaft Pro Stock raw 24502585 DRCE 2 Alum Peanut DRCE 2 DRCE N Shaft Pro Stock raw 25534404 DRCE 3 Alum Peanut DRCE 2 DRCE N Shaft Pro Stock raw 25534405 DRCE 3 Alum Peanut DRCE 3 DRCE N Shaft Semi-finished Steel Shim Head Gasket (1965-1990) B Composition Head Gasket (1965-1990) C

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