Re: Exhaust upgrade or powerchip
I agree with everyone else, chips are a waste of money on standard(ish) engines.
The standard ECU works very well indeed on the standard engine, and even when mechanical modifications start, the ECU copes quite well.
It's only when serious engine upgrades are made, you may need a chip and some dyno tuning.
The standard exhaust and manifold, OTOH, are complete garbage and don't flow very well at all.
Extractors and a decent 2.5" system will give you at aleast 10kw more power right across the range.