Well i just got a stainless steel canister style muffler installed and well its way to loud so i know i need to get a resonator to put before it, i have a 2.25 inch piping so how long of a resonator should i get to make it sound more mellow and to get the "bees" out of it or would a resonator even help? thanx guys.
Get the longest perferated core glasspack or resonator that you can possibly fit. Go under your car and measure from your cat converter back to where the first bend starts. Find one that takes up almost all of that space in there.