I got this Bullitt knob back in 2004 and in around 2006 the top knob part split from the part that screws onto the shifter. I've used silicon, jb weld, and some other stuff but it still usually ends up coming apart. The first time it happened I was on the racetrack and had my best 60' of the day then when I shifted into second it split. It was definitely my 11 second pass but it ended up with me coasting down the track. I love this thing though although it gets extremely hot in the summer and really cold in the winter.
Edit: I just ordered another one to replace my beat up one.
Edit: I just ordered another one to replace my beat up one.