i have a set of brand new rc 550 injectors w/ o-rings. ive been told they are too big for what im running right now so im not gonna put them in. im looking for 275 obo shipped (i paid 310 and never even took them out of the wrapper) or ill take a trade for someones smaller injectors. i guess i want some 300-400 cc so if anyone is interested e-mail me at kneef@mitscher.navy.mil . thanks