hello all.. im a newbie in exhaust and i basically dont know anything,

my ride satria neo 1.6 auto. so recently my catcon cracked and leak. so forcing me to changed it.

so i decided to change the extractor to 4-2-1, but only until middle section my muffler and silencer still remain the same.

my question is. when my rpm around 2000 it sound like leak, noise like turbo spooling.. but i have no turbo. isit my backend dont support this extractor or this because it have some leak on the welding? according to my brother, who send the car to workshop that is because my back-end doesnt support the new extractor and there is not enough exhaust circulation. how true is this?

should i go to another exhaust shop myself and get it checked? if it was the extractor quality issue how can solve this? change to a new one?

yea could be .. this probaby the issue.. will go to another shop this weekend and let see how it goes

i think u are right too.. my catcon crack most possibly it blocked.. and it could be the muffler blocked too.. let see above method first if it wont solve it.. i think this is the case

hmm previously 4-1 short with bold on cat con. so i change it to 4-2-1 long... totally remove the cat con and without cat con now

really? isit normal. but it only occur when im a bit hard on the padel and it goes to 2k rpm. and when idle the 'air' from the muffler just dont fell right. because previously i remember it much greater.. i mean the air get out from the muffler ...

mine not knocking or increase in sound.. well maybe increase a bit.. but what annoy me the sound like turbo.. like "izzzzz" when i press a bit hard..

car much better respond then it used to be with 4-1(catcon) but 2 thing bother me the sound and the amount of air coming out at the back of it

really? have u try to get it checked? can u provide link of that discussion please? yes mine also not on idle. and are u still use on standard from center to end?

yes totally positive with the sound, and there's no leak on the extractor. now wad i need to buy is ... i need center bullet and s-flow muffler.. but well.. i put it on hold first..