Oil Ring Support Rails
Ross Oil Ring Support Rails are to be used in applications where the piston oil ring groove intersects the pin hole and can be used only in pistons which have the oil ring groove machined .030 wider than the oil ring. This operation is included on piston designs which have the oil groove to pin intersections at no extra cost. Manufactured from spring steel.
| Bore | Part # |
|---|---|
| 3.027 - 3.066 | ORS-302 |
| 3.067 - 3.106 | ORS-306 |
| 3.107 - 3.146 | ORS-310 |
| 3.147 - 3.186 | ORS-314 |
| 3.187 - 3.227 | ORS-318 |
| 3.250 - 3.310 | ORS-325 |
| 3.375 - 3.435 | ORS-337 |
| 3.500 - 3.560 | ORS-350 |
| 3.565 - 3.620 | ORS-356 |
| 3.625 - 3.660 | ORS-362 |
| 3.655 - 3.720 | ORS-366 |
| 3.725 - 3.775 | ORS-372 |
| 3.780 - 3.840 | ORS-378 |
| 3.870 - 3.905 | ORS-387 |
| 3.906 - 3.985 | ORS-394 |
| 4.000 - 4.060 | ORS-400 |
| 4.061 - 4.120 | ORS-406 |
| 4.070 - 4.080 | ORS-405 RR |
| 4.121 - 4.187 | ORS-412 |
| 4.210 - 4.249 | ORS-421 |
| 4.250 - 4.310 | ORS-425 |
| 4.311 - 4.374 | ORS-431 |
| 4.375 - 4.435 | ORS-437 |
| 4.436 - 4.469 | ORS-443 |
| 4.470 - 4.530 | ORS-447 |
| 4.531 - 4.590 | ORS-450 |
| 4.591 - 4.625 | ORS-456 |
| 4.626 - 4.686 | ORS-463 |
| 4.700 - 4.760 | ORS-470 |
| 4.780 - 4.840 | ORS-478 |