there's one more fella quite good his workmanship, people call him "Akob" he and late Jaafar (JFA) used to work together for Ah Heng (AH Exhaust) when ah heng just started.. akob's workshop is located at No. 8, Jalan TS 6/10, Taman Industri Subang,
Just a piece of advice, AH Exhaust used to be very good but now the service really drop.
I have to returned more than 3 times to fixed the custom make turbo manifold done by them.