Butler Performance Inc. - Rings

Engine Components- Internal - Rings
Butler Performance has the rings for your Pontiacs. Stock rings came in a thickness of 5/64 5/64 3/16 (455- 5/64 1/16 3/16) while most aftermarket rings are 1/16 1/16 3/16. Drop in rings must be ring gapped appropriately. They may need files slightly to set a proper gap. File fit rings come with .005" extra material for filing to set proper ring gap. For street engines we recommend .016-.018 ring gap. Proper ring gap is crucial to the expansion and contraction of the rings due to heat.

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326 CU. IN. 3.750 Stroke 3.00 Main Journal Stock Bore 3.720 30 over 3.750 60 over 3.780 Factory Ring Thickness 5/64 5/64 3/16 Aftermarket Ring Thickness 1/16 1/16 3/16
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350 CU. IN. 3.750 Stroke 3.00 Main Journal Stock Bore 3.875 30 over 3.905 60 over 3.935 Factory Ring Thickness 5/64 5/64 3/16 Aftermarket Ring Thickness 1/16 1/16 3/16
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389 CU. IN. 3.750 Stroke 3.00 Main Journal Stock Bore 4.062 30 over 4.092 60 over 4.122 Factory Ring Thickness 5/64 5/64 3/16 Aftermarket Ring Thickness 1/16 1/16 3/16
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400 CU. IN. 3.750 Stroke 3.00 Main Journal 428 CU. IN. 4.000 Stroke 3.25 Main Journal Stock Bore 4.120 30 over 4.150 60 over 4.180 Factory Ring Thickness 5/64...More Details »
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421 CU. IN. 4.00 Stroke 3.25 Main Journal Stock Bore 4.093 30 over 4.123 60 over 4.153 Factory Ring Thickness 5/64 5/64 3/16 Aftermarket Ring Thickness 1/16 1/16 3/16
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455 CU. IN. 4.210 Stroke 3.25 Main Journal Stock Bore 4.151 30 over 4.181 60 over 4.211 Factory Ring Thickness 5/64 1/16 3/16 Aftermarket Ring Thickness 1/16 1/16 3/16
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