has anyone ever used 450cc black top.I did some searching and could not find very much info. i have a 4th gen civic mpfi. are there any marking on the black top injectors to know if they realy are 450cc. can i use these with vafc hack instead of blue top?

 

If these are the 2g DSM black top 450cc injectors, they should have a green tip...

If you need some I have a set...

 

so will these still work? will i have to unwire my resitor box.

 

b16drag how much for the 450s

 

I believe you still need your resistor box, yes.