Normally sound accs shop will have contact, you can check with them... Many people will mod/upgrade proton car, other brand need to rely on technician's skill...
But why you wanna increase amp output? ICE modding?
i'm planning to change my knuckle from stock waja 4x114.3 to 5x114.3.. currently i'm using front 2 pot evo3 caliper on waja stock knuckle & stock caliper+disc+knuckle on the rear.. the closes i can find after do some...
My Z's front disc rotor is thinning (non-brembo), and i just bought a brand new dixcel rotor, and looking for an ideal front brake pads to replace them together. Any recommendations in terms of...