just got a 2001 iswara from my dad.got 15" rims n a roaring exhaust.but i looked inside the bonet all standard lol.not sure what to upgrade 1st. sifus can help?

LOL.ya2 ambipur did alredy
extractor i think still oem oh.so 1st change the extractor.4-2-1?piping size?if change extractor then how bout the end exhaust still can keep the already have?

thank u bros.appreciate all help still new to this.wondering if platinum or iridium plugs and performance cable can boost power too

oh.then mayb hold off changing those cables.
gonna change spark plugs first coz cheaper to upgrade lol.