I have a bone stock 85 Mustang GT and I removed the factory Y pipe and replaced it with a 95 mustang H pipe. Now with just the cats and no exhaust it seems to have lost its low end. Should I put a stock turbo style on or high flow race muffler? Which muffler would work better? I don't think sound control will be an issue due to the preheaters and the cats or could it still be too loud w/ the wrong muffler?