o i see. i called up obx today and they mentioned that they are different in length but he does not know how long is the gsr cat. the ls cat is 16 inches and estimating that this ls cat is short by at least 2 inches from the looks of it. Im taking my chances on buying the gsr high flow cat and see what happens. But as much as possible, i dont want to get my exhaust welded on a shop. i still want the DIY bolt on. looks clean too.
Ill let you know what will happen. anyways, if any of you guys have any info on this please let me know. i got until tonight to crack this. thanks!