Yes, the 337 intake is a single 4bbl Max Wedge intake from Mopar Performance. Low profile with an integral valley. It is the intake you use if you're running original type Max Wedge heads on a 440 block. It is the only intake that fits that combo since it has the integral valley. There isn't a bathtub gasket for the MW ports so you have to use the 337 intake.

It fits with Indy or Victor heads but you end up with a double valley tray arrangement which looks a little funky. It works fine, just looks weird.