having a complete exhaust system changed with a dummy
cat,downpipe changed,extractor changed n yr muffler operated or
getting LTA approved does have a significant
improvement in yr car’s performance.but then again if u wan better
improvement u need proper tunning too.in layman terms u r allowing
yr car to breathe better.but too much is also not good as there is
not enough back pressure.sound wise there r too many to discuss n
many diff after market exhausts aval n it depends on yr own taste
of sound.cost wise it can range bet a few hundreds to 1k plus.it
depends on whether u wan it legal or illegal.just e muffler or e
whole system or u wanna breakdown without yr extractor etc….
