I had just started to port my intermediate housing when i noticed the injector boss's were in the way, the rear one poped out no problem, however the front one is stuck damn well, i acualy broke off the lower piece trying to remove it, any tips on removing it w/o damaging the housing

also, where can i buy a set of replacemtn boss's?

 

do you mean the diffusers? if so just spray them with carb cleaner and tap them a bit.