You'll need 4.5" BS for the RCX. Bilstien 0-2" on the front AAL for the rear

 

bds 6" claims 37/13.5 will fit on the 09-11's and you can run a wheel with 5.5" of backspacing and you can run stock 20's IIRC . there is one guy on here that is fitting them, but no clue on his username or anything.

 

I'll have a 2" asl for sale here soon for 65 shipped

 

I wish I would have planned ahead instead of going with a 2" level on 34's to 6" on 34's to 8 or 9" on 37's. Im a perfect example of always wanting to go bigger.

Asl? I spent 20 mins trying to figure out the abbreviation and im stumped.

 

autospring AAL IIRC. he's going to a 4" AAL instead

i'd go ahead and have your spacer installed when you lift it assuming the lift you get does not already use a spacer so you don't have to pay install twice and pay for 2 alignments