I am looking forward to responses on this as well.
MY Brother has a TS on his Duramax. I know its not exactly the same but he is very well pleased with the results. TS makes some very good products and has a good reputation.
Just a point of info You may have already done this, but you will also need to open up your exhaust. Run a straight thru muffler, or straight pipe it. Also check into a free flow air intake. This will help the airflow in and out.
You might get a post or two about keeping everything stock. Factory specs are the best. We hot rodders know better. Its all about throttle control....
We dont race on Elvis's Birthday