modification

So far I’ve added MAPerformance catted downpipes, their catback exhaust, and Z1 intakes on my 2025 MT Performance. I know it sounds silly, but in my head I could replace the downpipes with stock parts if needed for warranty purposes. A tune would completely void it. Am I doing more harm than...

Had the HKS exhaust installed last December, took it for over 2k miles. The both sound modes are perfect for people who want an exhaust for different purposes, or sometimes when I have different moods in my car(although it's not as convenient as those valves). As I turned off the ASE and with...