Cheers Notts,notts04chillimini said:dont risk it! if anyone says u can add 20bhp for £4.95, u just generally dont believe them! and in this case just dont believe them! it can damage your engine because if the resistor fails then your ecu will make your cylinder timing wrong and just blow up the engine! go with the one click or superchips option for around 300 quid! these are new maps that are put into the cars ecu, and have been tried and tested with good results! altho to be honest i would rather keep the standard ecu values and just go down the exhaust and induction kit route! which i have done! good luck anyway what ever you decide to do to your car!!
if its immense power your after save your pennies and get an s which would be about the same on insurance as standard as what a modified one can be! or even save even more and get a jcws in future, if your lucky enough and your insurance permits!