i have a BD superbee and ats manifold on my 98 12v 5spd with a #100 plate and 550 horse full feramic clutch. what injectors should a get to stay as close as possible to 550 horse? they say its under rated so a little over should be alright.

 

Useable power? stage 3's
The SuperB won't be enough turbo to keep temps in check once you hit the 400hp mark. The 12v's are just poor breathing heads. You'd need even more turbo and stage 4's if you want to get 500.