Just finished this mod earlier today.
I'm not the very keen to changes, but I guess there's a "quicker" response when downshifting to speed up.
What I hate the most is when I approach a stop light, I start to slow down (mabye from 45mph down to 20mph) and then just before I slow way way down to a near stop, the light turns green, and I try to continue... there's that short delay before the transmission kicks in; this is prior to the resonator cut.
I did this a few times today after cutting those bottoms out, and I guess there's no longer a delay.
However, I'm one of those anaI folks: I'd like for someone to propose a reasonable explanation of what has changed to allow the transmission to engage or predict a little better when downshifting?
Here's my pic contribution:

the left-most "duct" is cut at an angle because I couldn't position my hacksaw to cut in a parallel line
