I'm running the rev-hard mani jet black coated...stock injectors and am maken 254whp....I'l be uping the injectors to 720cc and running a hondata here in less then a month. My goal is 300whp on a stock bottom end. I'll keep you post. Back to the topic I've heard the rev hard is good till about 400whp....thats all I'm looking for in the long run so thats why this mani was the right choice for me. Plus they are cast iorn so will not crack. :wink: