anak_liar, to fabricate your own downpipe (I'm assuming you are talking about exhaust headers), you need welding equipment, tubing benders and some other misc stuff. Unless you want to experiment with different downpipe configurations, it's wiser to get a premade one to save on all the hassle.
Sad to inform each & everyone of MLOCian's regardless wherever U're...That our JB lead ALFRED aka Lanevo6 is goin' to SWITCH to another club...This sad news had been confirmed by the JB DEWAN RAKYAT...Not even he's...