The stouter guy on the bike in the second pic is the owner of the bike, the guy in the Suzi jacket is from Powerhouse, good guy. I won't name him on the interweb. Good engine guy and a pretty handy drag racer, usually on a suzuki. Re exhaust, one must understand that sometimes the customer wants something which may not always be the best performing thing, is my guess. It may also work better than we think? Shock are Gazi I think. Nobody spot the oil tank?
Never was a fan of "lobster back" exhaust fabrications they were all the rage 50 years ago when we home made exhaust systems and never had a mandrel bending machine ,I would guess they would not flow anywhere as well as a modern mandrel bent system ,a very labour intensive method as well 40 or 50 individual welds would eat up the costing budget