ok here is how it works
you get a Y pipe
http://cgi.ebay.com/ebaymotors/Dynom...spagenameZWDVW
now you see the 3 bolts , thats where this machine will come in place.
the piping that goes straight goes to your cat back or exhaust
and of course the other extension ( 3 bolts ) attaches this machine. then you just weld this y pipe setup after the header or (turbo) after the downpipe.
then you do the power wires for the machine and your all set .
Now you have your stock exhaust( or aftermarket)
and your E-cut, when you wanna race or make more power , you simply press the button and the switch open.

Here are pics of my turbo downpipe and Y pipe and flexpipe and an older e-cut machine. this is also for sale by the way

You can have this Y pipe all you have to do is cut it off and give me all the other stuff back