Thinking about getting a yaris

[sv650steve]

I've got my plan pretty much figured out. When i get the car i'll do MI springs and rear swaybar first. How long do the factory shocks last? Will i be ok swapping springs at 100k ish miles thats what most of the cars i see on craigslist have. Also where do i get the flanges for the corolla manifold? Is there a right up on this? I have 3 or 4 junk yards i can hit and try to find some.