I thought bottoming out was near impossible until I found out otherwise.... easy way to check is grab a cable tie and wrap it around the shock shaft. Slide it all the way down till it meets the shock at the bottom then go for a run. Mine ended up in the bump stop on just a small drive around and mind you I had 300lb springs and that wasn't even on the track. If you do have Koni's fitted, once they have been bottomed out without a stop, a full rebuild will be needed of the shock. Best insurance is a small lump of urethane that will save you many hours of labour and a few hundred dollars.