Suspension components question
 

I'm about to upgraded my LCA,tie rod and knuckles. The company that makes it said he has it for the S4. From research I found out S4 and S5 suspension are :nod:interchangeable. I just want to double check if the s4 LCA,tie rod and knuckels bolts rightup on to my S5 convertible?

LCA and tie rods for sure.I have S5 lca's in my S4 right now. And im pretty sure all the FC knuckles are the same

s5 has the integrated ball joint.
The s4 has a ball joint that is separate from the LCA,so that is why people look for s4.They don't have to replace the whole LCA is the Ball joint goes,

misterstyx69 beat me to it. Parts are readily exchangeable but the S4 LCA is considered "better" since the ball joint is replaceable independent of the entire S5 assembly.