| Dyno-Peak | HP | HP Gains | Torque | TQ Gains |
| Baseline | 319.0 | | 329.3 | |
| Headers/LS6 Man. | 344.8 | 25.8 | 350.9 | 21.6 |
| Dyno-Avg | HP | HP Gains | Torque | TQ Gains | A/F Avg. |
| Baseline | 289.5 | | 319.0 | | 12.4 |
| Headers/LS6 Man. | 308.5 | 19.0 | 339.0 | 20.0 | 12.7 |
Baseline Test parameters
- Air-inlet temperature 101.0 degrees F
- barometric pressure 29.20
- vapor pressure 0.35 in. HG
- correction factor 1.01
Jet Hot Headers & SLP LS6 Intake Manifold Test parameters
- Air-inlet temperature 72.3 degrees F
- barometric pressure 29.97
- vapor pressure 0.091 in. HG
- correction factor 0.97
Recommended Tools:
- Metric Socket Set
- Metric Wrenches
- Flat-bladed Screwdriver
- Schrader Valve Tool
- Fuel-line Disconnect Tool
- Torque Wrench
 LS1s from '98-'00 came equipped...  LS1s from '98-'00 came equipped with AIR tubes, which are removed by unbolting two 10mm bolts. The AIR tube is moved to the rear of the manifold, then the passenger-side spark plug wires are unsnapped from the coil packs. After disconnecting the coil pack harness, the five 10mm bolts that retain the coil packs to the rocker cover are removed and the assembly is lifted out of the engine bay. |  A single 15mm bolt retains...  A single 15mm bolt retains the dipstick tube to the block, and after it's removed, the coil pack connector is disconnected on the driver side. A Schrader valve tool relieves fuel pressure and the fuel line is then separated from the rail by freeing the fuel line clip and using a fuel line disconnect tool. |  The plug wires are then disconnected...  The plug wires are then disconnected from the coil packs and a 10mm socket and long extension remove the two AIR tubes. Until such time as the manifold comes off, the coil pack can remain bolted on. |