DavidZhu

any one notice their exhaust makes a ticking sound on a cold start? I just got the secondary cats done and noticed the exhaust from the back end makes a very faint ticking sound and goes away after 1-2 min. cant hear the sound while in the car and have to get kinda close to the tips to hear. Was wondering if this is normal?

DavidZhu

I guess its not really a ticking sound but more of a fast cycling sound

w62820616

I just noticed that this morning. so probably normal

bgm130

could be the valves before they heat up. if you have the performance exhaust there are 3 and regular has 1.