BMW Performance parts vs Aftermarket parts
A general question. How does BMW performance parts compared to the normal aftermarket performance/tuning parts in terms of price, performance, reliability and long-term value-for-money?
If I am not mistaken, strictly speaking, all aftermarket parts are illegal in HK, whereas BMW performance parts would not be illegal? Although I know this is not necessarily strictly enforced by the police (given all the tuned-out ricers on the road).