street dominator is a great intake. i have one on my 440. but, i dont believe it is the best choice for a stock 440. you will lose some low end and if your engine is truly stock i dont think you will gain enough top end to be of any benefit. the stock intake is really pretty decent on a stock engine.the performer and the m1 dual plane are probably no better than stock. ch4b is pretty good. performer rpm would be a good choice if hood clearance permits.