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i have a 00 civic si that i have had for about 8 months. it is still a work in progress and funds are tight so its slow going. when i got the car the guy had some exhaust mods done. for some strange reason there was a rattle coming from the exhaust. i think it was between the header and catalytic converter(which was factory). i replaced the cat with a high flow and the rattle went away for awhile. recently it has returned with a vengeance. everything is tight and snug. i cant figure out what it is. anyone else have this problem and if so how to fix?
i know this sounds silly but when i did the motor on my dodge pickup i accidentally dropped a bolt in the exhaust wich went un noticed for months one day it decided to make a lil noise and it took months to figure out what i had done. anything that can happen will happen, good luck
i know what u mean man, just put on an aftermarket header on my 98 civic and i hear vibes and rattles sometimes, dont know what it is yet if i figure it out tho ill post it