Just like the 1LE Camaros & Firebirds.
Sadly, when I got my firebird Pontiac no longer offered 1LE as a stand-alone option. It was WS-6 or nothing. Lots of firebird owners bought cheap take-off 1LE swaybars from camaro owners who were doing suspension upgrades, and it really reduces front end bounce in rapid turn transitions. But you couldn't get that damn swaybar installed from the factory for some stupid reason, and the WS-6 package was $4500 for an additional 15ish hp, 17" wheels, the bigger swaybar, and some bling. A garage mechanic could beat that for under $1000 in one weekend of bolt-ons, minus the wheels, but then most guys would just put takeoff vette wheels on anyhow because they were wider and weighed less than any of the pontiac options, and some of the vette wheels had the right bolt pattern and a perfect offset to avoid rubbing the fenders so they were a direct bolt-on upgrade with no fiddling required.
But pontiac screwed the pooch by not offering the 1LE package on all V8 firebirds... I'd have gotten it if they did, an easy extra $100 in GM's pocket.
Interesting on that 1LE.net page, they have some WS-6 firebirds labeled as 1LE... That seems odd. The ram-air package came with WS-6 and was a complete waste of money unless you were buying it as a collector car. What's worse, the WS-6 package bumped the f-body to super stock in SCCA Solo2 even though it was only a slight performance increase for a ton of money.
Maybe they offered 1LE by itself sometime after 1998, but you couldn't get a 1998 firebird with just 1LE, at least not when I bought mine.