| Stock ECM |
| Adaptive On 14 Deg Base Spark |
| RPMx1,000 | HP | FT-LB |
| 3.80 | 188.73 | 260.84 |
| 3.90 | 204.87 | 275.89 |
| 4.00 | 216.03 | 283.65 |
| 4.10 | 225.09 | 288.35 |
| 4.20 | 232.28 | 290.47 |
| 4.30 | 238.28 | 291.04 |
| 4.40 | 243.97 | 291.22 |
| 4.50 | 248.61 | 290.17 |
| 4.60 | 250.91 | 286.48 |
| 4.70 | 251.59 | 281.15 |
| 4.80 | 253.55 | 277.43 |
| 4.90 | 256.68 | 275.13 |
| 5.00 | 258.42 | 271.46 |
| 5.10 | 260.92 | 268.71 |
| 5.20 | 263.12 | 265.76 |
| 5.30 | 263.76 | 261.38 |
| 5.40 | 264.44 | 257.20 |
| 5.50 | 265.00 | 253.06 |
| 5.60 | 263.66 | 247.28 |
| 5.70 | 260.22 | 239.77 |
| Max | 265.00 | 291.22 |
| Stock ECM W/Pypes |
| RPMx1,000 | HP | FT-LB |
| 3.80 | 191.32 | 264.35 |
| 3.90 | 205.50 | 276.75 |
| 4.00 | 217.30 | 285.31 |
| 4.10 | 226.28 | 289.86 |
| 4.20 | 235.17 | 294.08 |
| 4.30 | 242.30 | 295.95 |
| 4.40 | 248.75 | 296.92 |
| 4.50 | 252.38 | 294.56 |
| 4.60 | 254.13 | 290.16 |
| 4.70 | 256.19 | 286.28 |
| 4.80 | 254.57 | 278.55 |
| 4.90 | 258.70 | 277.29 |
| 5.00 | 258.68 | 271.72 |
| 5.10 | 261.60 | 269.41 |
| 5.20 | 263.65 | 266.30 |
| 5.30 | 265.07 | 262.67 |
| 5.40 | 265.81 | 258.53 |
| 5.50 | 264.53 | 252.61 |
| 5.60 | 262.66 | 246.34 |
| 5.70 | 258.67 | 238.35 |
| Max | 265.81 | 296.92 |
| Old Stuff | Pypes |
| Idling | 78 dB | 70 dB |
| WOT acceleration | 92 dB | 88 dB |
| Cruise 55 mph | 81 dB | 75 dB |
| Cruise 80 mph | 83 dB | 78 dB |
Though it doesn't seem like much, it should be noted that just a few decibels make a big difference. The Pypes system is 4-8 decibels quieter (from inside the car) than our old system with dumps; since we traded our old H-pipe for an X-style midpipe, we picked up some torque, too-the best of both worlds. Now that's music to my ears.
As you can see in the chart, horsepower was up by 4 at 4,500 rpm, though peak remained the same. Torque, however was up by 5 lb-ft at peak.