I have a White 99.5 early build #247.
Mods include the following:
Bassani full system headers to tips.
PSP 2 position chip/Superchips 2 position chip
(I am currently running the Superchips one)
PSP intake tube & filter.
Currently have 13K on the clock (It is my work truck and I only live 14 miles from my store). Only problems of note are the notorious front end clunk and attendant "wandering front end".
Still on original plugs/original radiator fill/original intercooler fill. Ruined one tire on a curb and am still running the other three originals with about 50% wear.
All other problems are most likely due to the mods. It pings under hard accelleration on winter gas if the chip is activated. The exhaust system has to be constantly untightened and realigned and retightened, but I had that problem with the stock system too.
Have never taken it to the track, but did have it dynoed way back when after I installed just the chip and got about 28 hp at the wheels with no learn time.
I am very picky about racing on the street, read only when super safe, and have danced the dance probably a dozen or so times. Won against almost all the domestics, but got beat by a couple of V-12 Bimmers and at least one V-12 Benz and one of those little Benz roadsters with the little K on the side. Nasty little buggers.
Am sort of aquainted with a few other L owners in the Atlanta area and all have the same story, that no "Maros or "Stangs will tangle with them any more, so the reputation is pretty well established.
Love the performance and my only dislikes are the low quality of the audio system (also no power antenna) and what I feel is a cheesy interior other than the seats themselves which are first class.
Sorry for the long post, just thought I'd pitch in a little bit.