Shafts are designed for most all 331/354/392 Hemi rocker stands and will work well for a big power street rod to a nostalgia nitro burning Hemi. Shaft thickness is .200" and material that shaft is made from is 4130 steel.
Shafts are plugged with threaded plugs on the ends so no leaking O-rings and easy to remove if the shafts need to have the oil passages cleaned out after a thought that was going to work tune up call.
Rocker shafts are sold in sets of four. Racer gets two intake and two exhaust rocker arm shafts for one great price!!!!
*** ROCKER COLLARS WILL NOT FIT 5.7, 6.4 GEN 3 HEMI ENGINES. ***