I installed my megan header and exhaust this weekend and noticed a clicking noise from the engine after it. I check the oil level and its at full. Could it be the thin walls from the header making the noise? I hear it in idle and when im driving. I also retightened everything and it still makes the noise. What do you think it is???

 

Sounds like thinner metal being struck by exhaust gas/particles.

Could also just be things expanding and contracting since the parts are still being "broken in". Could also be a small exhaust leak.

 

Id say the noise is your exhaust, evertime i turn off my S i hear something comming from the Cat... How do you like the Megan header??

Post up Pictures of the install, if you would!

 

Well, get the car hot, then shut it off. If it does it while the car is off, it's normal.

 

It doesnt do it while the car is off, only when its on. Kinda sounds like a bad belt or like when the car is low on oil