Originally Posted by brandonjansen
Out of those kits you mentioned I'd go with Zone for a 4" lift. It comes with new rear springs where the RCX only comes with large coil spacers which I'm not a fan of at all. I believe the Zone kit will level your truck properly. An RCX kit would require Bilsteins to achieve that.
Honestly I think 35's look fine with a 6" lift as well. As long as the suspension lift is all you do (no body lift). For the $150 more to go to a 6" over a 4" I'd definitely say go 6". It's such a little bit of money in the scheme of things and you'll probably end up regretting going with the 4" down the road. That's just my two cents.
What he said spend the extra $150 and go with the 6"