The Sonoramic Commando Intake?

Some "Golden Commando" cars with 361/383 engines were equipped with Sonoramic systems. Some 300 letter cars with 413 engines were equipped with Ramsonic systems. They are designed to work @ 4500 rpm max. And work they did. They were designed to work in heavy cars at low rpm. The max wedge and race Hemi intakes were designed for high rpm (for the day) in light weight b-bodies. I have ridden in Sonoramic equipped vehicles and I can tell you they pull like mad up to 4500 and then they just suck gas like flushing a toilet.