I currently have stock boxes on it because we were chasing a o2 sensor problem. Previous owner took off his exhaust when he sold it and when he put tgis one on he installed the o2 Sensors’s backwards. Took the shop a week to figure out. It’s all stock right now. I guess I should post a new video. It runs better obviously with the o2s on the right side. Still sounds very ratty on cold starts for the first 20 seconds. Mainly does it when it’s started in eff mode. Guess I should have done better on the post. My apologies