27 Mar 08, 08:32 pm
68bronco Wrote:...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
You mean cutouts that can be opened up to be basically open headers and then closed to run on the street? Some are just caps that you remove by hand and there are some $$y ones that open and close with a dash-mounted switch.