SBM Promaxx Flow Numbers

“in theory”, the guide and VJ work on the PM heads is done over here…….so it would be reasonable to assume any blending would be done here as well.

There use to be video from PM showing that stuff being done in-house.

I just looked at the website, and for the “Maxx series”
171 Mopar head, it does claim hand blending……and unshrouded chamber-
• 171cc Intake runners
• Ultra-smooth 356-T6 Aluminum casting
• Precision CNC machining
• 5 angle valve job
• Hand Bowl blended
• Unshrouded chamber
• Diamond honed Bronze guides
• Multiple chamber options
• Large spring pockets
• Multiple spring options
• Professional assembly
• Assemblies include 21-4N 1 pc stainless swirl polished back cut valves
• Machined and Assembled in the USA
Click to expand...