Does anyone have any info on re-programming the ECU on these cars (say, after fitting a Powerflow exhaust or something)? Can it be done or is a new chip the only solution?

To the best of my knowledge, you'll have to fit a chip - The available adjustments on the stock ECU are very limited. Dastek's pretty good ...

Thanks. I'll have to check them out.

Any other info about other makes is welcome....