Listers, The balance pipe is attached to each intake manifold with two studs. Are the studs just threaded rod, or is there a non-threaded section in the middle? Assume that they're steel and overall length an inch. Threads are 1/4-26 (BSF/BSC). Cheers, Bob Haskell AHCA 3000 Mk I registrar http://www.ciahc.org/registry_3000mk1.php