Hi guys I have a g37 vert 7 speed auto and I figured Id post this question on here hoping for more feedback , I noticed last night at wide open throttle from zero the car did not want to shift into second gear , it took about a second or two for it to finally get into second gear after sitting at rev limiter . Also i noticed this happening right after I changed to the ark full cat back exhaust . Thats the only mod I have on the car . Any feedback would be appreciated as this is driving me nuts .