ETS has created a high performance, direct bolt-on top-mount intercooler for the 04-07 Subaru STi. This intercooler features a large 19in x 7in x 4in core with 31 charge rows! Most intercoolers have between 24-25 charge rows. More charge rows means more heat transfer area which results in lower temperatures. This core has been specifically designed for the 2004-2007 Subaru STi; this is not simply an off-the-shelf core. Unlike other intercoolers, this intercooler requires no modifications to the A/C line behind the intercooler. This intercooler also uses studs to mount the blow-off valve instead of bolts which means no more stripping out the holes by over-tightening.