so i just got a used cobb down pipe. after 2 hours working to get it on i get everything set to screw down and the flange holes for the DP dont line up with the flanges for the stock exhaust? the stock flanges on the mid pipe are at an angle, while the flange holes on the cobb DP are horrizontal. cobbs site says it fits a stock exhaust cat back. there is no way this is going to line up. i have an 06 wrx but i havent read they have changed anthing with this. im thinking the flange was removed or knocked off for some reason then welded back on. it also seems 1/2 inch shorter than the stock DP. so did i just get screwed or does the cobb DP not fit the stock mid pipe????