98GTstang

I'm in the middle of swapping a 03 motor in my 98 and I noticed the exhaust manifold is smaller on the 03 so I swapped the old ones on. And another thing the idler pulley is a different set up on the 03 so do I have to use a new belt or the old one off the 98?

BlackMage

for the belt question, i would keep the idler pulley and everything the way it should be on the 03 and just run the belt for the 03 motor....

and im not sure what your asking about the exhaust manifolds?? if your asking if it will be fine, im sure it will be.