cheers again for the replies,

i dont know wheather this is true because a `mate` told me but if you change the lenth between the header and the pipe it changes slighty to when the power comes in?

-something to do with the longer the lenth the lower range power because of the exaust pulses slowing down?

-if this is true i can set my car up like this and it should give me more whelie power right?[sm=confused.gif][sm=confused.gif]

thanks for all your replies but people are telling me different springs strenth, some a saying hard some are saying
standerd,

any conclusion ------ PLEASE[sm=spinnyeyes.gif]