21 Mar 08, 12:18 am
dont glass packs add back pressure? i have 2in pipes dual runnin straight out the back with packs and no muffler in my bronco, it sounds nice but i want somethin quieter for the trails also i have heard of systems that are actualy two setups hooked together with relay switches to you can run quiet and loud performance exhaust like you can switch back and fourth when you need it