I have PRW stainless 1.6's on my 340. Upon inspection, one had a messed up bushing. Other than that, they were a great value and are working flawlessly for me. Don't let others who have not used them talk you out of anything. Listen to those who have actually used the products you're asking about. To me, first hand experience trumps the internet experts. I have no experience with the speed master rockers. Either way you go, even if you opt for higher dollar rockers, inspect the hell out of them before bolting them on.