so my steedspeed t3/t4 manifold has been welded a few times needed a new manifold came across this http://cnj.craigslist.org/pts/4129715101.html the OBX website with that same part # is $600 with a 321 stainless. he said he got for 200 selling for 75 to good to be true. anyone herd of this obx brand making our manifolds? if so any good?