| Block Height | 10.3 |
| Fitment | Engine Specific |
| Bore | 4.39 |
| CID | 520 |
| CID | 545 |
| Comp Height | 1.35 |
| Comp Ratio @ 74cc | 10.1:1 |
| Comp Ratio @ 74cc | 9.7:1 |
| Comp Ratio @ 80cc | 9.3:1 |
| Comp Ratio @ 80cc | 9.6:1 |
| Comp Ratio @ 94cc | 8.5:1 |
| Comp Ratio @ 94cc | 8.8:1 |
| Dome Volume | -39 |
| Gram Weight | 575 |
| Oversize | 0.03 |
| Rod | 6.7 |
| Rod | 6.8 |
| Stroke | 4.3 |
| Stroke | 4.5 |