| The Cam Box |
| Camshaft | | Adv. | Duration | Lift | Lobe |
| | Duration | @ 0.050 | (inches) | Sep. |
| | (0.006-inch) | |
| Stock 5.3L | Int. | 259 | 190 | 0.456 | 114.0 |
| Hyd. Roller | Ex. | 259 | 190 | 0.464 |
| LPE GT2-3 | Int. | 255 | 206 | 0.571 | 118.5 |
| Hyd. Roller | Ex. | 282 | 221 | 0.578 |
| LPE GT1-1 | Int. | 276 | 229 | 0.631 | 114.5 |
| Hyd. Roller | Ex. | 303 | 242 | 0.631 |
| Component List |
| Description | Manufacturer | Part Number |
| Camshaft, aggressive hyd. roller | LPE | GT1-1 |
| CNC ported Gen III heads | LPE | LNO-227-350-08 |
| Steel roller rocker stand | LPE | LPE-RKR-STAND |
| Pushrods, Hi-Tech | Comp Cams | 7950-16 |
| Valvesprings, conical, LS1 | Comp Cams | 26918 |
| LSX intake, 78mm throttle-body | Comp Cams | 54001 |
| LSX intake, 90mm throttle-body | Comp Cams | 54003 |
Test ResultsWe begin this month with Test 4, which was the highest power run from last month's Part 1 story.
Test 4: Stock 5.3L SSR truck engine with 131/44-inch headers, stock heads, and the larger LPE hydraulic roller cam.
Test 5: This test included LPE CNC-ported heads and larger injectors.
Test 6: This included all the above modifications plus an F-car front accessory drive system and the Comp Cams LSX intake manifold.