you can use various calculator and DIY it yourself. The only problem I can think of is finding the exotic components that will make your passive not at bargain price anymore :D
screw the passive for now la,sifu........gonna go active,perhaps when i'm ready to invests in serious SQ shit,i'll go back to passive.......u said u've got a friend for installation.....is it Abg.Yus from Batu Caves??
anyone know any place??..
no need stainless steel lor
normal like exhaust pipe also can lah hehehe
just wan to make the engine bay "arrangeable" hehe
on budget maaa..