I put the corsa on myself. I think it sounds really good and the massive factory muffler is now gone which is a plus. It’s an easy install that I would buy and do again.
I installed last week. I found if I put the bolt through the inside and nut outside it was easier. I have one like the pictures in the instructions and three reversed. My ocd want to change that one but it’s such a mfer that I’m leaving it.
He asked after I paid if I wanted it anodized black. I think the first batch was done this way. I’m happy how it turned out and feel fortunate I got the knob from AR before they shut down.