ERZ Performance High Flow Cats, Install and Review Thread

[spearfish25]

Originally Posted by djpathfinder

I just had mine installed this morning. The exhaust note sounds good. A little louder than before. There's a rattle though. Sounds like it's coming from the front near the exhaust manifold. You can hear it when you're outside the car or with the window open. It's not as noticeable when the windows are closed. Did you guys notice this? The OP mentioned hissing and rasp...I don't hear that, but I definitely hear rattling. I talked to the mechanic and he said all the bolts were tight including the ones that go on the support pieces. No rattling before the install. Anyone experience this? Bluestyle also has a thread about ERZ HFCs, so I'm going to ask there as well.

Definitely no rattles for me. When the car is idling, there is just the low growl of the exhaust. On a cold throttle blip, there is noticeable rasp but this dies out significantly once the exhaust comes up to temp. If it's rattling even at idle, it should be easy to localize. Just start the car when you have it up on jack stands. Then crawl under and have a listen.