i bought some long tube headers and an offroad xpipe for my mustang and it didnt come with anything else. after i found this out i bought 2 head gaskets and head bolts. but the head bolts the guy got me where long ones. are these the right ones or do i need short one and are these the only two pieces of hardware that i need for long tubes.

 

You need a pair of manifold to head gaskets, a set of manifold to head bolts or studs/nuts, four downpipe to header flange bolts/nuts, and a pair of O2 sensor harness extenders for the upstream sensors.