Chevy Small block V8
PISTONS AND PISTON RINGS GM Performance Parts pistons are premium quality and stand up to the rigors of high-performance street and competition use. They’re factory tested, so you know you’re getting the right parts for your engine. Pistons are sold individually unless otherwise specified. Available in standard and oversize diameters. Wrist pins included with all pistons.
SMALL- BLOCK PISTONS Part Engine Compression Head Chamber Size Pin Type Technical Notes Number Size Ratio Volume
93422884 350 8.5:1 76cc Standard Pressed 290 hp 350
10181389 350 9.8:1 58cc Standard Pressed 5.7L HO; second design with ZZ1, 2, 3 ID; hypereutectic aluminum
10181390 350 9.8:1 58cc Standard Pressed 5.7L HO; second design with ZZ1, 2, 3 ID; hypereutectic aluminum high limit aluminum
10181392 350 9.8:1 58cc +0.030 Pressed 5.7L HO; second design with ZZ1, 2, 3 ID; hypereutectic aluminum
10159436 350 10:1 58cc Standard Pressed 5.7L HO, ZZ4 and LT1; high silicon aluminum
10159437 350 10:1 58cc Standard Pressed 5.7L HO, ZZ4 and LT1; high silicon aluminum 9.6:1 62cc high limit
10159438 350 10:1 58cc +0.030 Pressed 5.7L HO, ZZ4 and LT1; high silicon aluminum 9.6:1 62cc
12371059 350 10:1 58cc Standard Pressed Kit containing 8 of P/N 10159437 9.6:1 62cc high limit
12371060 350 10:1 58cc +0.030 Pressed Kit containing 8 of P/N 10159438 9.6:1 62cc
12514101 350 9.1:1 64cc Standard Pressed 350-cid 300 hp & 330 hp service engine with "SP" ID
12514102 350 9.1:1 64cc +0.001 Pressed 350-cid 300 hp & 330 hp service engine with "SP" ID
12514103 350 9.1:1 64cc +0.030 Pressed 350-cid 300 hp & 330 hp service engine with "SP" ID
12489437 383 9.1:1 64cc Standard Pressed 383 crate engine, first design
12497879 383 9.1:1 64cc +0.030 Pressed 383 crate engine, first design
88962542 383 9.1:1 64cc* Standard Pressed 383 engine, second design 9.7:1 62cc*
88962748 383 9.1:1 64cc* +0.005 Pressed 383 engine, second design 9.7:1 62cc*
88962749 383 9.1:1 64cc* +0.030 Pressed 383 engine, second design 9.7:1 62cc*
12499103 383 9.1:1 64cc* +0.005 Pressed Kit containing 8 of P/N 88962748 9.7:1 62cc*
12499104 383 9.1:1 64cc* +0.030 Pressed Kit containing 8 of P/N 88962749 9.7:1 62cc*
*Compression ratio based on .028" thick head gasket. SMALL- BLOCK PISTON RINGS Part Number Bore Size Oversize Ring Thicknesses Description
995667 4.000" +.030" 1/16, 1/16, 3/16" For 302/327, 350 and select aftermarket 383 engines
366289 4.000" — 1/16, 1/16, 3/16" Racing piston pack for heavy duty pistons
366291 4.000" +.030" 1/16, 1/16, 3/16" Racing piston pack for heavy duty pistons
88894219 4.000" — 5/64, 5/64, 3/16" Standard size , production style rings for 350HO and ZZ-series (except ZZ4) engines
14089026 4.000" +.030" 5/64, 5/64, 3/16" Standard size , production style rings for 350HO and ZZ-series (except ZZ4) engines
12528817 4.000" — — Low tension rings for ZZ4, LT1, and LT4 engines
12528818 4.000" +.005" — Low tension rings for ZZ4, LT1, and LT4 engines
12528819 4.000" +.030" — Low tension rings for ZZ4, LT1, and LT4 engines
12499135 4.000" +.005" — Premium quality standard size rings for 2nd design 383 engines
12499136 4.000" +.030" — Premium quality rings for 383 engines
12499107 4.000" +.005" — Set of 8 ring packs of P/N 12499135
12499231 4.000" — — Set of 8 ring packs of P/N 12499136
12499236 4.000" — 1.5, 1.5, 2.5mm Set of 8 ring packs of P/N 88894243
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