06 WRX, VF39, Cobb ots map.
Same setup for 6 years.... and this is the first issue Ive ever had. Plus.. there is no CEL to look up a code.
Car pulls great at high rpms... hits full target boost (18).... no backfiring..... etc.
During acceleration..... car hesitates and bucks a little between 2800 and 3800 rpms..... and the "grabs" and pulls strong all the way through redline.
Spt intake... clean filter.... clean maf. 3" exhaust... no cat to clog.