Was considering building a stroked 340 and was considering the Promaxx heads CNC'd with 2.08" valves. Was wondering if anyone has any experience with the valves that come with them. Was wondering if they are a quality valve. I think they are Ferrea valves. Not sure if they were imported for them or if they are indeed Ferrea valves. Hope I am spelling that right. Thought maybe they used an import valve thru ferrea to put into the heads?? Any info would be appriciated. Thanks.

I cant say 100% but im pretty sure they are not ferrea valves, ya know a simple email to promax would solve any doubt.

They show a spec of the valves they use which is the spec on many SS valves from all over. Some of the shops on the tube also do impartial reviews on heads and one even commented they did not seem like ferrea by the part numbers and quality. (It was a PM shocker but for a chevy) I know all the ferrea valves I use are laser marked with ferrea or there PN and the vids ive watched show nothing close but more like a common spec valve sold by many.

Pro max should have a china flag as a backdrop on there website. Yes I know most stuff is at least cast in china and many cant help it but look at there oem casting section, not usa products.

Understand im not dogging promax as many companies are kinda screwed into working with china castings and forgings (most our stroker kit parts) ect..

But just email mail them and ask, im sure you will get an honest reply because thats in there best interest.

All companies make errors. This is a Ferrea valve that should of been finished.

Ferrea itself is an imported valve. Think they are made in South America if I remember right.

Argentina as I recall, and at one time was told all the good blanks came from the same place.

I have been told to just buy bare heads and install my choice of valves which should disperse any valve issues. They are claiming no valve issues with the current valves in the heads now but I would feel better with a good known brand. I too heard something about Argentina but there is so much talk of old and new its hard to tell what is what on this. I would love to have trick flows but not in the budget. If I did go with bare heads and bought my own valves what brands would a guy recommend? Thinking I will call Promaxx and see what the valve PN are. Thanks for all the replies!



Ok, just got off the phone with them and spoke with Howard at Promaxx. He could not for some reason give me a part number for the valves. He said depending on the stock status the valves will be either a valve made for Ferrea or Race Engine Valves. They are a stainless steel valve and reports that they have zero issues with them. They come with 5 angle valve job. Each are supposed to be made at the same facility and are located in Argentina. Here is a link for the Promaxx heads: https://promaxxperformance.com/product/shocker-185-mopar-cnc/