they are good ... but they can be too much or not enough , depending on what you want for results?? Fox bodies will do 12s on GT40s and Ported heads.. 11s on a shot of juice.... 10.00s on a turbo...SOOooo... how much and what results??
Do a seatch for AFRs or FTI or Buddy Rawls ( for custom grinds.. he rocks)