I installed KN filters in my new 2025 Z and noticed that there is "more" black smoke stains on the exhaust tips. I ran the car with stock air cleaners and very little black stains. Put the KN's back and this is what I get. Any ideas?
I have the Z Sport,no Bose or subwoofer. Where can I connect the subwoofer in the back ? Are there any sites that can help with an install? My local audio guy wants $1200 to install a JBL sub in the wheel cavity. Thanks in advance.