have done a good amount of searching....learned a lot but have one remaining question pertaining to tii drive train w an n/a motor.
would a tii LSD fit with my s4 n/a sub frame? or when ppl say 'swap your rear end' are they including the sub frame in the 'rear end', meaning i also need a tii sub frame?
thanks guys.

 

you will need the t2 half shafts as well. other than that, its a straight bolt in swap.

 

all rear diffs are straight bolt on, no need to swap the entire subframe.
As Sircygnus said, you will need the halfshafts as well if you are swapping the diff unit. N/A halfshaft will not bolt to the diff. All 5 lug halfshaft (turbo and N/A) has the same splines and diameter on the hub part though.

 

yes, i understand all that...thank you guys, i answered alot of my questions by searching...just couldnt find this answer before i got tired of weeding thru n/a(non-applicable) threads.
thanks guys, thats all i needed to know for now.

 

you will go very far my good man. 1000 Internets to you.