I have a stock 318 and was wondering if anyone knows what type of can I can put in for a little lop sound but still get good mpg but to crazy where it sounds it's going to die ideling

 

Two threads?

We’d need to know a little more. what year? What is your goal? Major thump or a little punch with some nice mileage?

I always recommend the comp camps 256. that’s the bumpstick I went with in my own 318. really good low end torque with nifty mileage and very little LOP. If you want more LOP, you can step up to the 268 but it recommends a higher stall converter and now you have a major project.

 

Very easy to overcam a small engine with limited heads and end up with a dog. What you want in a 318 is the "modernized equivalent" of the old 340 stick cam. No more.

"Lope."

This idea of showing up at the drive in and wow'n 'em all with your big cam has always seemed less than intelligent to me.

Do you want it to sound like an AA/F or do you want it to be first at the other end?

 

You could look at the Comp Cams Thumpr series, would not be my first choice in a camshaft but will get you the noise you want.