you can dissasemble the flappers unless you grind off the nuts and bolts that hold the flapper onto the shaft. the factory galls the ends so the nuts wont fall off. its a simple matter of cutting off the y-pipe flange. clocking it correctly and re welding. took me 15 min. mine are tucked up tight to the floor and have more clearance than the rest of the exhaust.
I USED THE SAME KIT AND MINE WORK FLAWLESSLY FOR FOR 1800 MILES.
