Gen III V-8 Head Basics - Gen III Tech
Photography by Will Handzel
| Common Gen III V-8 Engine RPO Packages and Power Output |
| RPO | Description | Power Output | Comp. | Chmbr. | Int/Exh. |
| Displacement | HP/Torque | Ratio | Vol. | Port Vol. |
| Liters (ci) | | | (cc) | (cc) |
| LS1 | 5.7 (346) car |
| Corvette | 345/340 | 10.19 | 67 | 200/70 |
| Camaro/Firebird | 305/335 to 325/350 |
| GTO | 350/365 |
| LS6 | 5.7 (346) car |
| Corvette | 385/385 '01 | 10.46 | 65 | 210/75 |
| | 405/400 ’02-today |
| LQ9 | 6.0 (364) truck/SUV | |
| Escalade & | 345/380 | 10.08 | 71 | 210/75 |
| Silverado SS |
| LQ4 | 6.0 (364) truck/SUV |
| GMC/Chevrolet | 300/360 to 330/370 | 9.41 | 71 | 210/75 |
| Fullsize |
| LM4 | 5.3 (325) truck/SUV |
| '01 and later | 290/325 to 300/335 | 9.49 | 61 | 200/70 |
| Fullsize, ’04 SSR |
| ’04 Trailblazer/Envoy/ |
| Bravada |
| LM7 | 5.3 (325) truck/SUV |
| '99 and later | 285/325 to 295/330 | 9.49 | 61 | 200/70 |
| Fullsize |
| LR4 | 4.8 (293) truck/SUV |
| '99 and later | 270/285 to 280/290 | 9.47 | 61 | 200/70 |
| Fullsize |
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