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

 

that LOP LOP sound will cost you. in gas, AND parts.

 

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.