Actually..........the Dutt neck does nothing. Even Kenny admitted that the increase in boost was because be had to re-clock the compressor housing to line up with the new inlet, which caused the wastegate actuator to put more tension on the spring..........which caused the increase in boost.
I feel that the cost of the inlet and the welding is a complete waste of money. Buy a REAL........2015 technogy intercooler and be way ahead of adding a larger inlet to a dinosaur intercooler. Back in 1990 I took a die grinder to the inlet and removed the thick paint coating it and ran 11.77 @ 112 with a stock turbo and a 2.5" down pipe. Sorry........waist of time and money. Step into the current technology and do it right.