You should get an SYE regardless for 3.5 or 4.5I believe youll need to SYE with the 4.5"
You don't need a sye with a rubicon. You just need a double cardan driveshaft adjustable control arms and a cv style track bar bracket.Habsfan124 said:rcherb, I have a Rubicon, so I do not believe SYE is necessary. But is a new drive shaft necessry? rda616, what are some better quality kits?
The hourglass bushings used in their control arms are crap and need replaced often. The spring rates are very high which makes for a short spring free length. The 3.5" gave me 4.25" lift. The track bar has a bend that goes right over the diff rather than bending out and away. This is an even bigger issue with their extreme duty track bar which uses a double sheer bracket. The heim joint re uses is also known for its short service life.Awshux said:I've got the RE 3.5", and it fits my 33s perfectly (IMO). I added SYE and CV driveshaft because I got some vibes after the lift, but I've had no rubbing or binding issues anywhere. I'm not sure why rda616 is recommending staying away from RE. I've had their kits and various components on two Jeeps now, and I've never had any issues with them at all.
I run the 4.5" springs with 35x12.50 KM2s. I put the 5.5" on at first and it was WAY too high for me. The 4.5" gave me more than 4.5" of lift but it was enough to comfortably clear the 35's. The 3.5" should be good for 33's.I will be getting a Rubicon Express lift kit in order to run 33" tires. Will be going with Pro Comp 7031 wheels (15 x8) and Duratrac tires. However, the Rubicon Express 3.5" and 4.5" are the same price for the Superflex kit. It would be nice to have the option of running 35's later on (maybe with a 1" body lift), so wondering if it makes sense to get the 4.5" lift immediately? Any drawback to going with the higher lift, either in performance or extra modifications needed?