So my experience is also pretty dated, but I have experience with both. Don Sr did a full 2 1/2 inch exhaust for me for my 67 Coronet and it was quite good. After he passed Don Jr did a 2 1/4 in set for me and it wasn't as nice. But no issue with delivery or communication - I think I picked them up at the Nats. Pretty sure Don Jr was at the Nats this year but can't swear by it.