Ok so I swapped the stock Cat system to a resonated AP midpipe and well something interested happened.

The car is smoking a bit.

I'm not sure if this is normal occurance or a possibility from over filling the oil system. I mean it smells like a rotary, like really bad. Just not sure if maybe this is normal.

Thanks in Advance.

- Chris

 

A little bit of smoke on startup is normal when cat less, if its a lot of smoke its bad.

 

When I first installed the BHR midpipe, and I started the car for the first time, I filled my yard with smoke, not sure if there was some sort of residue from the manufacturing process or what but I couldn't believe the smoke. Since then, like what Sonic said, a noticeable amount of smoke at start up then after a few minutes its very hard to see any. Smell is only really noticeable on start up and after sitting at a stop sign/red light.

 

Yea I mean it'll clear up after driving for a bit, just was curious.

 

I had the same experience when I put on my mid pipe. 125k on my 2006, and it sometimes smokes a bit, when cold, at startup.