i have my 350 into my car now,just working out the kinks right now,i need to quiet down my car,it is so loud,and cackles like a bi*ch,i have my full lenght headers,and then my exhaust is ran back dual till little past the middle of the car,runs into single pipe,up over axel and into my flowmaster with duals out the back,the pipes are pretty much straight,the whole way back from the headers till the axel,if that helps,my problem is,i have a performer rpm intake,so i had to go with a different hood,so i have a functional big block hood on it,and in the little rinky dink town i live in,these damn cops will pull you over for anything,and my car is just going to be so loud,and the hood doesnt help much either,what do you guys think i should do to quiet it down?

 

I'd say either put a hi-flo cat on, which should help, or change to a different muffler.

 

Get a high flow converter yes, or switch to a 50 Series or Delta Flow Flowmasters.