Starfox, 20 mm spacers will put his wheels to a +29 mm offset...
They won't fit, that is what I have been trying to tell DJKnowledge. 20 mm spacers work great on the jag rims like you had, at least the front ones. They also work great on the LS stock rims because the offset is so high on them.
DJ, The problem with the LS is the stock offset is so high and it is designed to drive with a high offset rim. People are trying to get a high enough offset on the wheels they put on their LS so they can drop it without rubbing. Finding that perfect combo can be tough, DJ why do you want to go lower with an offset? I think the stock offset for the LS is like 60mm or something. So like I said, with a rim that has like a 60mm offset it would make sense to put a 20 mm spacer on it to make it set out a little more. But you are already at 49mm that is pretty close to as low as you can go with any type of drop. That is where the rubbing comes into play at least with 20's.
There are many guys on here who know way more than me. The point is for the specific rims you have I don't think you can go much lower than where you are with a drop. Even without a drop 20 mm spacers are going to have your wheels setting out so far they will be torn up by your fenders.
Do a search for 20 rims or spacers and see all the info that people have posted about it.
I hope this helps bro-
