| Test 5 ? Headers | Test 6 Full roller 1.5 rockers | Test 7 COMP XE256H | | RPM | TQ | HP | TQ | HP | TQ | HP |
| 2600 | 377 | 187 | 380 | 188 | 387 | 191 |
| 2800 | 381 | 203 | 382 | 204 | 394 | 210 |
| 3000 | 390 | 222 | 391 | 223 | 401 | 229 |
| 3200 | 396 | 241 | 401 | 244 | 411 | 250 |
| 3400 | 400 | 260 | 403 | 261 | 413 | 267 |
| 3600 | 403 | 276 | 405 | 277 | 413 | 283 |
| 3800 | 407 | 294 | 406 | 294 | 413 | 298 |
| 4000 | 405 | 308 | 407 | 310 | 412 | 314 |
| 4200 | 401 | 321 | 402 | 322 | 406 | 325 |
| 4400 | 395 | 331 | 367 | 332 | 402 | 337 |
| 4600 | 387 | 339 | 388 | 340 | 394 | 345 |
| 4800 | 380 | 347 | 380 | 347 | 385 | 352 |
| 5000 | 368 | 350 | 368 | 350 | 375 | 357 |
| 5200 | 354 | 350 | 353 | 349 | 348 | 354 |
| 5400 | N/A | N/A | 339 | 349 | 348 | 357 |
| 5600 | N/A | N/A | N/A | N/A | 334 | 356 |
| Max | 407 | 351 | 407 | 351 | 413 | 357 |
| Avg | 388 | 287 | 389 | 288 | 396 | 293 |