Hi all can any1 send me a link how to lower rear on a 58 beetle?and what is best (inner or outer what lowers more?i wanna go 2 to 3 inches. cheers Shane

Try here
http://www.vw-resource.com/rearaxle.html

any1 know how many splines to lower 2.5/3 inches

Haven't lowered mine yet, but perhaps this graph will help? (Found over at the samba)

So, according to the graph, if you wanna go 3 Inches, then 7.65cm is pretty damn close.