I put Eibach 1.6" springs on the front yesterday. I'm pretty underwhelmed with the outcome. The truck still looks ass high to me. The front did come up ~1.5" though as advertised. I'll be swapping the springs out for the 2.7" or perch collars in the near future once I get the wheels and tires on and reassess. I would like to get the truck to sit similar to my Raptor. Granted it's probably a little nose high for some but I prefer a more pre-runner like stance.
As far as ride goes, it's as floaty and bouncy as stock. So if you're worried about losing your stock ride you won't be disappointed.
Also, I've gotten on it pretty hard and haven't noticed any additional squirrelyness or torque steer. 40psi cold in the tires. I'm thinking aftermarket tires are the culprit of that issue or maybe it's suspension + tires.
Before
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After
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