I think I can answer your question now. After going out and doing several pulls in 3rd gear and just driving around for about a total of 120 miles, I can say there is a gain in power towards the top end. I smiled from ear to ear, it pulled pretty nice from 4K to redline, better than before. Yes it's worth it. I got my 74mm TB for $80 off of ebay and got the o-ring gasket from FactoryChryslerParts.com.