K-4634 Kohler Cimarron is commonly sold at Lowes and Home Depot so causes misinformation like that in the lead review regret . So a picture says 1000 words. 1083980 works with both 1.28 and 1.6 GPF versions of K-4634, you just need to adjust the level in the tank (on the float valve - the other part) according to the amount of water you want to flush!
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