| Engine Family | LS 15° |
|---|---|
| CID/Ltr | 428/7.0 |
| Bore Inch | 4.065 |
| Bore mm | 103.25 |
| Stroke Inch | 4.125 |
| Stoke mm | 104.78 |
| Rod Length | 6.125 |
| Comp Dist | 1.053 |
| Crown Volume | -3.3cc |
| CR 1 | 12.7 @ 65cc |
| CR 2 | 12.0 @ 68cc |
| CR 3 | 11.3 @ 70cc |
| Alloy | 4032 |
| Weight | 415 |
| Pin | 0.927 |
| Oil Rails Included | Yes |
| Top Ring | 1.5mm |
| 2nd Ring | 1.5mm |
| Oil Ring HT | 3.0mm |
| Piston Style | Flat Top, two valve reliefs |
AutoTec, LS 15°, Flat Top, two valve reliefs, 4.065 Bore 4.125 Stroke 1.053 Comp HT
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