just bought a decat downpipe from a member on here and it doesnt have a lambda port on the down pipe,it only has one where the 2nd cat would be.
most of the decat down pipes ive seen have a port on top of the down pipe.

its to be fitted to a 2005 sti,will this still be ok or will a port need to be welded in?

cheers

 

Your lambda sensor will be in the manifold, and don't think the newages have anything that screws in near the top of the downpipe. I know mine doesn't, so if there's nothing to screw in then you'll be fine.