Hey everyone new to the forum but have been lurking for a while. Wanted to see if anyone has had this issue after installing the PRL HVI or PRL Intercooler. Just had a shop install both the other day but didn't notice until I was almost home and the shop closed that my car had hard/loud vibrations that I've never noticed before. Just at idle mainly while in drive at a red light. Almost every time with the air unit turned on. In Park it seems to go away. The car did seem like it was staying gears longer and shifting kind of hard when I first picked it up but thought maybe it was due to the increase airflow from the parts but as of today seems like that is back to normal. Just want to be able to tell the shop what to look out for before bringing it to their attention.