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OPGI Price: $272.99
Part Type: (G) Genuine General Motors product
Sold As: EACH
2016 Chevelle Catalog Page: 339
CH20328: 14" OD, 168-tooth for 10.4" or 11" clutch, two-piece rear main seal and small-block or big-block that is internally balanced
CH20330: 14" OD, 168-tooth for 11" clutch, correct for externally balanced engines. 454 only