Fun fact, I am two weeks into my Corsa on my '23 Yukon w/6.2 and the cold start sounds like absolute trash IMO. Raspy as heck until it drops the note on cool down. I don't know if it us just because my Wrangler 392's 6.4 exhaust is tuned to be so much deeper or what, but the high pitch rasp at cold start is not exciting and I have to change it.
I just ordered two smaller Corsa resonators from Summit and they'll go on this week. Corsa rep told me this will solve my problem they don't hear this feedback on the 5.3's but get it pretty often on the 6.2's. I'll try to do a write up of before and after with these 3 db resonators on it for those that care. Hoping it deepens the tone a little overall.