Help on mufflers vs glass packs

3 general rules,for a quieter exhaust. 1, longer case mufflers,are quieter than short case mufflers.2 the bigger the pipe size: more possible airflow,more probably louder.3 :over the axle tailpipes work wonders,for knocking raspiness down. What do you have on it,for mufflers now ? We need an idea,of the local yours "too loud " is. A straight up setup,2.5" inch exhaust,with a turbo muffler(Summit/Ultra Flo's / Dynomax Super Turbo),My suggestion.