RE: Dyno Tune for LS1??
Yeah, we put a similar, "dry" kit on our '98 when new. It provided about 50 RWHP boost I'd guess, but the car ran spotty and just "funny" under full throttle. But it was about three tenths faster in the 1/4 mil.
The smaller kits add NOS within limits that the engines ECM can figure out and adjust to, but it does not always do the best job. Unless you have the car tuned by a really good shop with a dyno and LS1edit, etc., you won't get real satsifaction.
I'd recommend buying a Nitrous Express or similar reputable company's "dry" kit on your car and jetting it for about 75-100 HP at the rear wheels, then having it tuned at a good shop on the dyno (the tune will cost about $400-$500). You'll get much more power and smoother operation that way and make certain the NOS is not doing something it shouldn't to engine longevity.
Aston Martin Vantage V8
Lincoln MKZ daily driver
1998 Camaro w. 408/AFR heads, etc.,+NOS street/strip