They don't fit. That what these guys were saying. The stacked version came out for the 03 models.

is the oval opening for the tip larger on the newer models?
thats probably what it is
and thats not a cheap tip either, but looks sweet

The way the newer tips secure to the muffler is the difference. DJ, your chrome tip is actually a sleeve that fits over the already welded on smaller oval tip of the original muffler. It is secured by the 2 screws on the left and right side of the sleeve. On the newer 03 mufflers, they were made without any tips on them at all, so you just see a hole and bracket where the newer 03 tips would bolt onto.

yeah i know that,. i actually had it off last weekend, wow did my car look plain and weird, maybe couse im used to it this way
i was just wondering why the stacked versio would not fit, i know that it would probably need to be either velded on, or secured another way, but would it make a problem when it comes to the actual opening on the bumper?

Well, I'm not talking about having to cut and weld...I'm just talking about plug and play. The stacked version is bolted on the same way the other 03+ tips are secured from the same mounting point on the 03+ muffler. I'm sure, however, that with a good welder, you could make any tip fit if you cut off the old oval tip and then weld on the new desired tips, as boggtown has.

thats what im talking about.
but im just interested to see if there would be a problem with clearance where the end of the tipo is, with the bottom of the rear bumper, the opening.
it should fit trough there with no problem, correct?

Yes, I don't think there would be any problem of it fitting, if welded on. It should clear the bumper without issues, IMO. That stacked tip, however, is crazy expensive from the factory.

I said that is a '99.