Here is a Mod
Jantzer Performance
Do a search on ebay for " LS2 LS3 LS7 Ported Throttle Body Corvette C6 GTO LS1 TB "
This guy is on eBay, I just met him today, he lives in my hometown of Grants Pass, Oregon.
I took a look at his TB,s and they are great looking, I have an appoinment monday to have my Ported TB Installed. I did a search on google about him , some good some not so good. What I found out is he is a small business man trying to make it in a bad economy. So if you have any problems I am sure he will work it out. Looks like a one man operation, trying to get a fresh start. Second mod is a Jet MAF,
Powr-Flo Mass Air Sensor
Part #: 69116
And last is a K&N filter, # 33-2334
All these mod,s are for the 2007 Impala SS 5.3L V8
Dont worry about cold air intake, This car gets its fresh air from the front of the car by the left front running light.
I have to do the install first then go to the Dyno for a tune.
I will let you know how it turns out for me.
One more thing here is a nice hood for your 07 Impala.
mpd-inc.net/Impala.htm