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D-Port Exhaust Heads For Pontiacs

Krf Aluminum Heads
The KRE aluminum D-ports are... 
   
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Krf Aluminum Heads
The KRE aluminum D-ports are a simple swap-the only oddity is the special-length bolts, but ARP makes them. We had to use roller rockers, but we kept the ratio the same. Don't try to tell us these made the 40hp difference.
  TEST 1 TEST2 DIFF
RPM TQ HP TQ HP TQ HP
2,500 450 214 465 222 15 8
2,600 448 222 462 229 14 7
2,700 452 233 466 240 14 7
2,800 456 243 477 255 21 12
2,900 461 255 490 271 29 16
3,000 469 268 502 287 33 19
3,100 476 281 511 302 35 11
3,200 485 296 519 317 34 21
3,300 489 307 526 331 37 24
3,400 492 319 531 344 39 25
3,500 494 329 537 358 43 29
3,600 493 338 539 370 46 32
3,700 492 347 539 380 47 33
3,800 490 355 537 389 47 34
3,900 487 362 535 398 48 36
4,000 483 368 530 404 47 36
4,100 480 375 523 409 43 34
4,200 473 379 516 413 43 34
4,300 465 381 509 417 44 36
4,400 458 384 504 422 46 38
4,500 452 387 498 427 46 40
4,600 444 389 486 426 42 37
4,700 435 390 471 422 36 32
4,800 423 387 456 417 33 30
4,900 413 385 442 413 29 28
5,000 396 377 430 410 34 33
5,100 384 373 419 407 35 34


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