is the Ex high flow cat/test pipe...
 

is the Ex high flow cat/test pipe the same as the tanabe extender peice that adapts the LX car to the ex exhaust if i just plug up the o2 sensor holes? (ebay has some for very cheap right now and im a cheap dude so...)

Not 100% sure, but I don't think the EX cat/test pipe will mate up w/ the LX exhaust manifold. I think u need EX headers if u want the test pipe.

ill sell you a megan racing downpipe.its for a ex thou. so go get a ex header.