Std 001 O S 020 O S 030 O S 040 O S u 53 55 CORV 6 cyl 54 57 ALL w 235 3 707454 3707455 3707456 6 6 50 54 57 ALL w 261 3707460 3707474 6 6 30 54 57 ALL w 261 3 707461 3707462 3707463 6 6 50 55 56 P ASS 8 cyl exc dual 4BC Q 55 56 COMM 11 Q TON 8 cyl exc hvy duty 3717776 3713810 8 6 30 55 56 P ASS 8 cyl exc dual 4BC 55 56 COMM 1 TON 8 cyl exc hvy duty 3734904 3734905 3713541 8 6 50 55 56 CORV 8 cyl 55 56 2 TON 8 cyl 56 PASS w dual 4BC 56 1 Q TON hvy duty 37320211 37320231 8 6 30 55 56 CORV 8 cyl 55 56 2 TON 8 cyl 56 PASS w dual 4BC 56 1 Q TON hvy duty 37320251 37320271 37320291 8 6 50 57 ALL w 265 3739876 3739878 8 6 75 57 ALL w 265 3739880 3739882 3739884 8 7 00 57 ALL w 283 37398861 37398881 4 8 6 75 57 ALL w 283 l 37398901 37398921 37398941 8 7 00 NOTE When these pistons are installed on models prior to 1950 it will be necessary to use Ring Unit which contains top compression ring 1 NOTE 4 valve relief depressions on top of piston 0 633 RUSHING Piston Pin 37 53 ALL 2 I D x 6 O D 1 1 length 838551 12 40 0 636 PIN Piston Std 0015 O S 003 O S 005 O S 010 O S Length 37 52 ALL 53 ALL exc P G 838570 3701395 602319 602320 602321 3 95 6 1 10 53 PASS w P G 53 55 COHV 6 cyl 54 57 ALL w 235 3701538 3703686 3704881 3 704882 3 Tg 6 1 10 54 57 ALL w 261 3702451 3707495 3707496 3 707497 31 6 1 10 0 643 RING Piston Production Type complete set for one engine per container Std 020 030 040 O S O S O S 37 53 ALL w 216 3688881 1 14 50 50 52 ALL w 235 53 ALL w 235 exc P G 3705266 1 19 00 55 57 ALL CORV w 235 expander design 3721046 3721048 3721049 3721050 1 21 00 54 57 ALL w 261 expander design 3720212 3720214 3720215 3720216 1 21 00 55 57 ALL CORV w 265 expander design 3719631 3719632 13719633 3719634 1 26 00 Service Type complete set for one exngine per container Std 020 030 040 O S O S O S 37 53 ALL w 216 608201 608202 608203 608204 1 14 50 37 53 ALL w 216 37040081 37040151 37040201 37040251 1 19 50 41 49 ALL w 235 608205 608206 608207 608208 1 14 50 41 49 ALL w 235 37040521 37040561 37040581 1 19 50 50 52 ALL w 235 53 ALL w 235 exc P G 3696718 3696719 3696720 3696721 1 14 50 50 52 ALL w 235 53 ALL w 235 exc P G 3704030 1 3704037 1 3704042 1 3704047 1 1 19 50 53 PASS CORV w P G 54 57 ALL CORV 6 cyl w 235 371300211 371300311 371300411 371300511 1 19 50 54 57 ALL w 261 373167611 373168111 373168511 373168911 1 21 00 55 57 ALL CORV w 265 372499811 372499911 372500011 372500111 1 23 50 57 ALL CORV w 283 373890111 373890211 3 73890311 3738904111 1 26 50 lNOTE These Ring Units contain ci top compression ring INOTE These Ring Units contain lg compression rings NOTE Contains chrome plated top compression ring 1 NOTE Cromtlex Ring Set having chrome plated oil rings top compression ring and chrome plated rail for middle compression ring 145 0 629 0 643