Which is the differents of this profile 421-428??
F fil_b ClioSport Club Member 172 FF and Fabia VRS Apr 21, 2009 #2 i think the 428 cams can be run off the standard ecu
joker83 Clio RS 172 Apr 21, 2009 #3 fil_b said: i think the 428 cams can be run off the standard ecu Click to expand... With no remap???
M maupineda Renaultsport Clio 172 Apr 21, 2009 #7 ^As above, what if head has been skimmed? How much skimming can you do with 428's or 421's?