Hey guys... I want to go from the stock dual exhaust (89 GTU) to an Apex N1 single. BUT my problem is that once I do that I'll have this empty space where my left side exhaust used to be... Does anyone sell a piece/know how to make something that would fill this space out... just so it looks flush? I want to be able to take it out easily- like with bolts- in case I ever want to change back to dual. (so bondo is out) I tried a search but to no avail. Thanks.