Ok so the first video is a cold start completly stock. The second video is a cold start with the downpipe installed. The last video is a warm start with the downpipe installed and some revs. Didnt wanna rev a cold engine. Sorry for the crappy sound quality. Its just my iphone. Funny thing is I have a go pro and never use it and when I think about it its always dead. Oh also the exhaust flapper valve is open in all of these.