Hello, I just ordered a hi-flow catted downpipe and I'm eager to install it, but will I need a tune? I currently already have a tune from randy. I know the hi-flow downpipe will probably trip an error code but besides that, is there any danger to running an upgraded downpipe without a tune revision? I'm mainly concerned about maybe running too lean from the increased airflow but I thought maybe the ecu/tune will compensate for that?