Mine factory was like 4500 I have it at 3500 right now.... It crosses over VERY good for a single cam, feels just like a B16 if not better... When it hits the car actually jumps... But i kind of fixed itI put the new fuel filter on which I think was the original(190K) and it still did it, so I up'd the fuel on the VAFC +4 from 3500-6000... And its pulling all the way threw with no weird revlimters or anything..... IDK if I have the wrong injectors or something, but I'm going to change my plugs here in the next day or two and do what mainstream told me again, and see if there white again.....