Besides Jet, is there any other companies that upgrade/reprogram 5th gen ecu's? The ones I've seen like Skunk2 seem to be for every car but 5th gens. Also is there a benefit to an upgraded ecu even with a VAFC? I understand that the VAFC changes air/fuel ratios and the vtec point, but besides the rev limiter, what else would be changed with an ecu that a VAFC couldn't do?