way to go with GTR nuts (I got the part # somewhere, let me know if you need it). Also the nuts on the short studs might need to get shaved a bit or use a slightly thinner washer. Im not sure if its the same with Ash Spec manifolds. OEM gasket for MSPs should be ok??? Ash's manifolds have a bigger diameter on the ports so im going with a custom cut gasket with same material that the OEM gasket is made of.