Being price is within $100 of each other.

Considering a turbo will be used in this application are these heads about the same?

Which one has more potential later on if porting is done?

440source has been around a long time and I'm familiar with the name. (advertising works)
But the ProMaxx heads have the bling bling sound and seem "new".


"Old" member Registered: Sep 2001
Lost my credentials, I'm Back!! LOL
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