I installed Sportlines a couple of weeks ago, and since then every time I start the car and put it in gear there is a metallic vibration noise coming from the rear of the car. I gave it a quick look, but I can't see anything wrong (exhaust hangers, etc). Once the car has been running for a while it doesn't make the sound when starting in 1st. Anyone else have this happen?

 

Loose exhuast heat shield maybe?

 

exhaust leak maybe? i dont know....mine does vib abit but i have poly mounts too, only when its cold or the engine is under a load....

 

It isn't the shield; I don't have the stock manifold on. And it doesn't sound like a leak.

 

i had an exhaust heat shield rattling right behind the resonator, have you checked there?

 

I didn't think of that. I'll check it as soon as I can.