"Touge Factory O2 sensor" It is a 90 degree pipe that has a nut that allows you to position the pipe how you want it. I actually bought mine off ebay. (a great tip from RED, Thank you) I looked on the Touge Factory site and could not find them. I did find a couple of plugs from Vibrant, but not the 90 degree pipe. Maybe you have to contact them about it. I am not sure, as I said I bought mine through ebay.
The Vibrant D/P I have is 2.5" I bought it through CA. Although, the pipe did have to be modified to fit my car. The stock D/P on my LT was almost 37". The pipe from CA was 34 1/4 ".
2007 LT 2.2
GMPP Air Intake * GMPP Extrude Honed Manifold * GMPP Cat-Back Performance Exhaust * Vibrant D/P * Jet Stage 2 Module
MOBIL 1 Synthetic Oil * DC Sport Strut Tower Brace * Color Matched Mirror Covers * EuroAntenna * 30-15 3M FX Tinting
Bridgestone Potenza Pole Position RE960AS on Premium Wheels
2.4 Intake Manifold Conversion * 2.4 TB * TUNE