I ran a best of stock at 15.2 in the 1/4. I ran two other times, once with header, pulleys, and intake and ran a best of 15.4 but it was about 90 degrees that day and the track was horrible. I ran another time when it was 50-60 degress with intake, header, and thermal catback and the 15.4 was my best that day as well.

Personally although the Thermal catback was nice sounding I think it lost horsepower on me.

i'm going to the track again in a couple of weekends and hoping to get my pulleys back on before then. I've switched from the Thermal to a Apex WS for no other reason then the Thermal droned a bit on the highway where the WS is silent.