Piston Specs
| Part Number | OEM | Bore | Comp Ratio |
Valve Config |
Approx Weight Grams |
Comp Height ** |
FAA PMA |
| ASC1021 FL | Lycoming | 5.125 | 10:1 | Parallel | 1230 | 1.945 | No |
| ASC9521 FL | Lycoming | 5.125 | 9.5:1 | Parallel | 1205 | 1.913 | No |
| ASC10007 | Lycoming | 5.125 | 8.7:1 | Angle | 1115 | 2.050 | No |
| ASC10207 | Lycoming | 5.125 | 8.7:1 | Angle | 1330 | 2.050 | Yes |
| ASC10545 | Lycoming | 5.125 | 7.3:1 | Angle | 1365 | 1.785 | Yes |
| ASC11487 | Lycoming | 5.125 | 10:1 | Angle | 1175 | 2.130 | No |
| ASC15157 | Lycoming | 5.125 | 9:1 | Parallel | 1095 | 1.885 | No |
| ASC15357F | Lycoming | 5.125 | 9:1 | Parallel | 1275 | 1.885 | No |
| ASC75089F | Lycoming | 5.125 | 8.5:1 | Parallel | 1240 | 1.853 | Yes |
| ASC75413F | Lycoming | 5.125 | 7:1 | Parallel | 1120 | 1.715 | No |
| ASC69958F | Lycoming | 4.875 | 6.5:1 | Parallel | 1000 | 1.723 | No |
| ASC69841F | Lycoming | 4.875 | 7.5:1 | Parallel | 1090 | 1.833 | No |
| ASC69885F | Lycoming | 4.875 | 8.5:1 | Parallel | 1140 | 1.923 | No |
| ASC76172 | Lycoming | 4.875 | 8.7:1 | Angle | 1130 | 2.060 | No |
| ASC23110 | Lycoming | 5.318 | 9.9:1 | Angle | 1350 | 2.040 | No |
| ASC653009 | Continental | 5.250 | 9:1 | Angle | 1220 | 1.940 | No |
| ASC653010 | Continental | 5.250 | 10:1 | Angle | 1230 | 2.000 | No |
| ASC539021 | Continental | 4.062 | 9:1 | Parallel | 730 | 1.793 | No |
| ASC539521 | Continental | 4.062 | 9.5:1 | Parallel | 740 | 1.838 | No |
| ASC648010 | Continental | 5.000 | 10:1 | Multi | 1210 | 2.050 | No |
**Compression Height is measured from center of pin hole to top of crown - except P/N ASC10007, ASC10207, ASC11487 & ASC76172 which are measured to a gage point.