| ACDELCO 12S21 Specifications |
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| Thickness | 0.146 IN | | Inside Diameter | 50.00 MM | | Outside Diameter | 2.323 in | | Material | Rubber | | Inside Diameter | 1.969 in | | Thickness | 3.700 MM | | Seal Type | Gasket O Ring | | Outside Diameter | 59.00 MM |
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ACDelco Quality ACDelco breaks down their premium portfolio of Original Equipment and Aftermarket parts into two tiers: GM Original Equipment and ACDelco Gold.
| GM ORIGINAL EQUIPMENT |
| GM Original Equipment parts are the true OE parts installed during production or validated by GM—designed, engineered, and tested to rigorous standards and backed by General Motors. |
| ACDELCO GOLD (PROFESSIONAL) |
| ACDelco Gold parts are the high-quality alternative to OE parts, manufactured to meet GM expectations for fit, form, and function and backed by General Motors. |
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| OEM / Interchange Numbers: 19114573 |
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