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8N-1233: 157.2mm Inner Diameter Top Piston Ring Description:RING-PISTON TOP \| Engine:3508, 3512, 3516 \| Application:776C, 785, 994, D11N	8N-0502: 137.16mm Outer Diameter Top Piston Ring Description:RING-PISTON TOP \| Engine:3406, 3408, 3412 \| Application:245, 621B, 637D, 651E, 657B, 657E, 772, 772B, 777, 980C, 988B, 992C, D10	303-3141: RING-PSTN-TO Description:RING-PISTON TOP \| Engine:C13 \| Application:CX31-C13I, TH35-C13I	247-6130: 137.16mm Outer Diameter Top Piston Ring Description:RING-PISTON TOP \| Engine:3406E \| Application:365C, 365C L, 365C L MH, 374D L, 374F L, 583T, 587T, 621B, 621G, 623G, 627F, 627G, 631D, 637D, 651B, 657E, 657G, 735, 735B, 740, 740B, 770, 770G, 773F, 773G LRC, 775F, 775G LRC, 775G
237-0194: 137mm Gage Diameter Piston Top Ring Description:RING-PISTON TOP \| Engine:C15 \| Application:621G, 623G, 627G, 657E, 824H, 825H, 826H, 986H, D8R, D8T, RM-500, TH35-C15I	223-9159: 137mm Gage Diameter Piston Top Ring Description:RING-PISTON TOP \| Engine:3412D \| Application:24M, 385C, 385C FS, 385C L, 385C L MH, 390D, 390D L, 631E, 631G, 633E II, 637E, 637G, 657E, 657G, 772, 772G, 777C, 777D, 777F, 777G, 834H, 834K, 836H, 854K, 988H, 988K, 992K, 993K, AD45B, AD55

8N-1233: 157.2mm Inner Diameter Top Piston Ring Description:RING-PISTON TOP \| Engine:3508, 3512, 3516 \| Application:776C, 785, 994, D11N	8N-0502: 137.16mm Outer Diameter Top Piston Ring Description:RING-PISTON TOP \| Engine:3406, 3408, 3412 \| Application:245, 621B, 637D, 651E, 657B, 657E, 772, 772B, 777, 980C, 988B, 992C, D10	303-3141: RING-PSTN-TO Description:RING-PISTON TOP \| Engine:C13 \| Application:CX31-C13I, TH35-C13I	247-6130: 137.16mm Outer Diameter Top Piston Ring Description:RING-PISTON TOP \| Engine:3406E \| Application:365C, 365C L, 365C L MH, 374D L, 374F L, 583T, 587T, 621B, 621G, 623G, 627F, 627G, 631D, 637D, 651B, 657E, 657G, 735, 735B, 740, 740B, 770, 770G, 773F, 773G LRC, 775F, 775G LRC, 775G
237-0194: 137mm Gage Diameter Piston Top Ring Description:RING-PISTON TOP \| Engine:C15 \| Application:621G, 623G, 627G, 657E, 824H, 825H, 826H, 986H, D8R, D8T, RM-500, TH35-C15I	223-9159: 137mm Gage Diameter Piston Top Ring Description:RING-PISTON TOP \| Engine:3412D \| Application:24M, 385C, 385C FS, 385C L, 385C L MH, 390D, 390D L, 631E, 631G, 633E II, 637E, 637G, 657E, 657G, 772, 772G, 777C, 777D, 777F, 777G, 834H, 834K, 836H, 854K, 988H, 988K, 992K, 993K, AD45B, AD55