I am mustang guy so bear with me.

Do you guys have first hand knowledge and feedback on these heads? I'm building a new combo and i want to hear about these heads since they are nothing new to the chevy camp and they are like UFO's to ford guys. LOL casting? flow numbers? rwhp?

any info will be great help.

Brent

 

They have been discussed a lot at nastyz28.com. The consensus is that the flow numbers claimed by protopline on their site are exaggerated. Quality from certain suppliers is a bit shoddy. But for the money....

A couple of links off a search:

http://www.nastyz28.com/ubb/Forum5/HTML/006424.html

http://www.nastyz28.com/ubb/Forum8/HTML/004939.html

http://www.nastyz28.com/ubb/Forum8/HTML/005917.html

 

I have seen these heads flowed at the local speed shop. And they always out flow the dart and brodix heads. And cost alot less. I think there a great buy for the money. Just bought a set of big block protopline heads to install on my friends motor and they look great.

 

I seen a lot of SBCs with them at the last NMCA event I think and they were definately running bad *** numbers with or without power adders. I'm guessing those are the 14, 15 or 18 degree heads however and not as street oriented as their 23 degree stuff. I'd like to hear a lot more about Pro Action, Canfield, Darts newer Pro 1 heads, and even Jeg's new Alum heads. if anyone has any good links with info pleas epost them, thanks!