Gearing question

I still think the car has more in it also. I am discouraged about the results so far, but hey thats part of it. I think the car will go mid to low 11's in the end. The TTI headers I run are the shorty tri-y style. The flow could be better, but thats wjhat came on the car. I know that's hurting me a little. The trans may be slipping, I am not sure how to tell 100%. The gears and/or the tires need changed out to better utilize the rpm range and grunt of the motor. The motor runs GOOD! It revs hard and fast!