Nice installation and attention to detail work, as usual, Shelby. We always recognize (and appreciate) the quality work when and if your cars pass through this way.
Regarding the exhaust..... hmmmm. It would interesting to see an objective dyno result of this compared to other designs. A lot has been written, compared, and contrasted with respect to X-pipes versus H-pipes but I suppose there's good reason you never read much on "plus-pipes". The name of the game in efficient exhaust design is mitigating turbulance. From appearances - it wouldn't seem that this design was condusive to high HP. But, then again, there was a time when the majority believed the world to be flat.