Secondary Cat Bypass Pipes with Stock Exhaust?

[fornowh]

I am doing a modWell if you want a real moded sound here's what you can do....

The Green areas can be cut out and disgarded.

The Red Pipes outlined can be added for a straight though design, now if you want a little quiet you can keep those dotted areas open but if not spot weld to close them up.

Should straight forward from the diagram here.....
on stock muffer right now. This is what I am doing.